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AbulFozolJummanAbulFozolJumman
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JavaScript Function and Object
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‎function-examples.js‎

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// 5(Function Examples)
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/*
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function functionName (parameters){
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function body
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return
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}
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var returnedValue = functionName(parameters value)
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*/
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// Advance add operation by function
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// function getAverage (assignment1, assignment2, assignment3){
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// const total = assignment1 + assignment2 + assignment3;
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// const average = total / 3;
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// return average;
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// }
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// const assignment1Marks = 60;
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// const assignment2Marks = 58;
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// const assignment3Marks = 59;
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// var myAverage = getAverage(assignment1Marks, assignment2Marks, assignment3Marks);
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// console.log('my average so far: ', myAverage);
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function add(num1, num2){
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const sum = num1 + num2;
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return sum;
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}
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const result1 = add(12, 13);
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const result2 = add(35, 7);
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const finalResult = add(result1, result2);
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console.log(finalResult);

‎function.js‎

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// 1(Introduction and review of previous)
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// 2(function declaration)
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function startFan(){
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console.log('Stand up');
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console.log('walk towards the switch');
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console.log('Press the switch');
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}
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// calling the function
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startFan();
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console.log('Waking up in the morning')
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startFan();
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console.log('Eating lunch');
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console.log('Watching JS tutorial')
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startFan();

‎object-looping.js‎

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// 8(Object Looping)
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var shoppingCart = {
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books: 3,
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sunglass: 1,
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keyboard: 5,
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mouse: 1,
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pen: 25,
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shoes: 2
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}
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const keys = Object.keys(shoppingCart);
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// console.log(keys);
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// for(var i = 0; i < keys.length; i++){
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// var propertyName = keys[i];
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// var propertyValue = shoppingCart[propertyName];
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// console.log(propertyName, propertyValue);
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// }
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// for in loop
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for(var propertyName in shoppingCart){
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const value = shoppingCart[propertyName];
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console.log(propertyName, value);
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}

‎object.js‎

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var student = {
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id: 115,
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name: 'Solamin Khan',
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class: 9,
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marks: 98
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}
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var mobile = {
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brand: 'Samsung',
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price: 19000,
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storage: '64gb',
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camera: '7MP'
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}
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var myComputer = {
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brand: 'lonovo',
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price: 39000,
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color: 'silver',
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processor: 'i7'
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}
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console.log(myComputer.processor);
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myComputer.processor = 'i79';
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console.log(myComputer)

‎parameter.js‎

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// 3(Function Parameter)
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// function bringSingara(money){
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// console.log('taka disen: ', money);
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// console.log('ai nen singara');
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// }
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// var taka = 300;
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// bringSingara(taka);
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// function add(num1, num2){
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// console.log('going to add:', num1, num2);
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// }
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// add(125, 96);
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function sum(a, b, c, d, e){
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console.log(a, b, c, d, e);
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var sum = a + b + c + d + e;
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console.log(sum);
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}
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sum(15, 98, 56, 5, 9);

‎practice.js‎

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// Practice Tasks
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// Task-1: Write a function called foo() which prints "foo" and a function called bar() which prints "bar". Call function bar() in the foo() function after printing. What will be the output? Now call the foo() to see the output.
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// function foo() {
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// console.log("foo");
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// bar();
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// }
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// foo();
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// function bar() {
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// console.log("bar");
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// }
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// bar();
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// Task-2: Write function called make_avg() which will take an three integers and return the average of those value.
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// function make_avg(int1, int2, int3) {
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// const total = int1 + int2 + int3;
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// const average = total / 3;
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// return average;
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// }
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// const makeAverage = make_avg(60, 60, 60);
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// console.log(makeAverage);
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// Task-3: Write a function called make_avg which will take an array of integers and the size of that array and return the average of that value.
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// const array = [51, 52, 53, 54, 55, 56, 57];
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// function make_avg(nums) {
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// let sum = 0;
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// for (let i = 0; i < array.length; i++) {
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// const element = array[i];
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// sum += element;
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// }
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// const average = sum / array.length;
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// return average;
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// }
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// var averageFinder = make_avg(array);
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// console.log(averageFinder);
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// Task-4: Write a function called odd_even() which takes an integer value and tells whether this value is even or odd. Condition: "Has return + Has parameter" and "No return + Has parameter"
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// function odd_even(number) {
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// if (number % 2 === 0){
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// return "Even number";
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// }
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// return "Odd number";
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// }
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// var isEvenOrOdd = odd_even(37);
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// console.log(isEvenOrOdd);
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// Without return
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// function odd_even(number) {
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// if (number % 2 == 0){
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// console.log("Even number");
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// }
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// else if (number % 2 == 1){
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// console.log("Odd number")
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// }
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// }
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// odd_even(36);
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// Task-5: Write a JS switch on traffic lights signal direction
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// const signal = 'green';
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// switch (signal){
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// case 'red':
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// console.log('Danger');
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// break;
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// case 'yellow':
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// console.log('Stop');
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// break;
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// case 'green':
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// console.log('Go');
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// break;
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// default:
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// console.log('N/A');
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// }

‎properties.js‎

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// 7(Object Properties/Keys and Values)
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var shoppingCart = {
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books: 3,
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sunglass: 1,
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keyboard: 5,
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mouse: 1,
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pen: 25
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}
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// 3 way to get object property value
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// var penCount = shoppingCart.pen;
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// console.log(penCount);
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// var penCount2 = shoppingCart['pen'];
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// console.log(penCount2);
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var propertyName = 'mouse';
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// var mouseValue = shoppingCart[propertyName];
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// console.log(propertyName, mouseValue);
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// Get object property and value by using JS reserve keywords
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// var properties = Object.keys(shoppingCart);
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// console.log(properties);
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// var propertyValues = Object.values(shoppingCart);
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// console.log(propertyValues);
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// 3 way to change/set property values
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shoppingCart.mouse = 15;
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console.log(shoppingCart);
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shoppingCart['mouse'] = 29;
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console.log(shoppingCart);
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shoppingCart[propertyName] = 89;
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console.log(shoppingCart)

‎return.js‎

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// 4(Function Return)
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function add(number1, number2){
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console.log(number1, number2);
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var sum = number1 + number2;
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// console.log(sum);
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return sum;
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console.log('I need more code');
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return 15;
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return 'hello done';
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return 'I am hungry';
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}
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// add(45, 15);
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var total = add(80, 20);
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// console.log('total', total);
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function bringSingara(money){
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var singaraPrice = 10;
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var quantity = money / singaraPrice;
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return quantity;
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}
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var myTaka = 150
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var singaras = bringSingara(myTaka);
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console.log('Eating singaras: ', singaras);

‎switch.js‎

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// 9(JavaScript switch)
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switch(color){
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case 'green':
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console.log('You are a green friend');
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break;
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case 'blue':
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console.log('You are a BLUE friend');
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break;
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case 'white':
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console.log('You are a white friend');
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break;
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case 'red':
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console.log('You are a red friend');
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break;
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case 'yellow':
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console.log('You are a himu friend');
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break;
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default:
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console.log('You are a kala kala friend');
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}

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