refactor: string and function

Author: brijeshkumar-chavda

08_operators/01_unary_operator/02_unary_keyword_operator/01_typeof/01_typeof.js

@@ -8,6 +8,9 @@
 // -> Error Handling: You can use typeof in conditional statements to check for unexpected data types and handle errors gracefully. For example, a function might expect a number as input, and you can use typeof to check before performing calculations.
 // -> Debugging: typeof can be a valuable tool during debugging to inspect the data types of variables and identify potential issues
 
+// Note:
+// -> typeof returns a type in string format.
+
 // Syntax:
 // const variable = "value";
 // console.log(typeof variable);

8_string/1_string.js renamed to 09_string/01_string.js

@@ -1,12 +1,12 @@
-// String
+// Topic: String
 
 // Single quote
 console.log("Single quotes");
 
 // Double quote
 console.log("Double quotes");
 
-// Backtick (Recommended)
+// Backtick
 console.log(`Backtick`);
 
 // Multiline string use backtick

8_string/2_escape_sequence.js renamed to 09_string/02_escape_sequence.js

@@ -1,4 +1,4 @@
-// Escape Sequence
+// Topic: Escape Sequence
 
 // console.log("\'Single quote\'");
 // console.log("\"Double quote\"");

8_string/3_string_concatenation.js renamed to 09_string/03_string_concatenation.js

@@ -1,5 +1,6 @@
-// String Concatenation
+// Topic: String Concatenation
 
+// Using + operator to concatenate strings
 const string1 = "String";
 const string2 = "Concatenation";
 const result = string1 + " " + string2;

09_string/04_string_template.js

@@ -0,0 +1,4 @@
+// Topic: String template
+
+const variable = "value";
+console.log(`Use backtick to access ${variable} inside string`);

8_string/5_string_conversion.js renamed to 09_string/05_string_conversion.js

@@ -1,7 +1,7 @@
-// String Conversion
+// Topic: String Conversion
 
 // Number to String
-const number = 100;
+let number = 100;
 number = String(100); // Using string constructor
 console.log(typeof number);
 

8_string/6_string_index.js renamed to 09_string/06_string_index.js

@@ -1,4 +1,4 @@
-// String Index
+// Topic: String Index
 
 const string = "Hello, World!";
 console.log(string[3]);

09_string/methods/char_code_at.js

@@ -0,0 +1,12 @@
+// Topic: charCodeAt()
+
+// Q. What is charCodeAt()?
+// -> It returns the unicode of the character at a specified index in a string:
+// -> The method returns a UTF-16 code (an integer between 0 and 65535).
+
+// Syntax:
+// string.charCodeAt(indexNumber);
+
+let string = "Hello world";
+let variable = string.charCodeAt(3);
+console.log(variable);

09_string/methods/chat_at.js

@@ -0,0 +1,18 @@
+// Topic: charAt()
+
+// Q. What is charAt()?
+// -> The charAt() method returns the character at a specified index (position) in a string.
+
+// Note:
+// -> If no character is found charAt() return empty string.
+
+// Syntax:
+// string.charAt(indexNumber);
+
+let string = "Hello world";
+let variable = string.charAt(3);
+// console.log(variable);
+
+let string2 = "JavaScript";
+let variable2 = string2.charAt(100); // index out of range
+console.log(typeof variable2); // return empty string

09_string/methods/pad_end.js

@@ -0,0 +1,12 @@
+// Topic: padEnd()
+
+// Q. What is padEnd()?
+// -> It's add padding to string. As you can see in syntax there is parameter called targetLength which determine how much length string should have and there is padString parameter which take string that you want to add to original string as padding. If the original string length is less then targetLength it will take the padString and add to the original's end.
+
+// Syntax:
+// string.padEnd(targetLength, padString);
+
+let string = "Hello world";
+let variable = string.padEnd(20, "0");
+
+console.log(variable);