Convert a negative number to positive in JavaScript
Last Updated : 29 Dec, 2023
In this article, we will see how we can convert a negative number to a positive number in JavaScript by the methods described below.
Below are the methods to convert a negative number to a positive in JavaScript:
Method 1: Multiplying by -1
This is a general method in which we will first check whether the number is already positive or negative, if the number is negative then we will multiply the number by -1 to make it positive.
Syntax:
if (a < 0) {
a = a * -1;
}Example: Below is the implementation of the above approach
javascript // Javascript script to convert negative number // to positive number // Function to convert // given number to // positive number function convert_positive(a) { // Check the number is negative if (a < 0) { // Multiply number with -1 // to make it positive a = a * -1; } // Return the positive number return a; } //Driver code let n = -10; let m = 5; // Call function n = convert_positive(n); // Print result console.log(n); // Call function m = convert_positive(m); // Print result console.log(m); In this method, we will use Math.abs() function to convert negative numbers to positive numbers.
Syntax:
Math.abs(value)
Example: Below is the implementation of the above approach:
javascript // Javascript script to convert negative number // to positive number //Driver code let n = -30; let m = 15; // Using Math.abs() function n = Math.abs(n); // Print result console.log(n); // Using Math.abs() function m = Math.abs(m); // Print result console.log(m);
Method 3: adding a minus sign
In this method, we will check whether the number is positive or negative, if the number is negative then we add a minus sign at the beginning of the number else return the same.
Syntax:
a < 0 ? -(a) : a
Example: This example shows the above-explained approach.
JavaScript // Javascript script // to convert negative number // to positive number // Function to convert // given number to // positive number function convert_positive(a) { return a < 0 ? -(a) : a; } //Driver code let n = -10; let m = 5; // Call function n = convert_positive(n); // Print result console.log(n); // Call function m = convert_positive(m); // Print result console.log(m); Method 4: Flipping the bit
In this method, we will use a bit-wise not operator which flips all the bits of the number. Since the negative number is stored in a most significant bit it also flips which converts it to a positive number.
Syntax:
a < 0 ? ( ~a + 1 ) : a
Example: In this example, we Flipping the bit to Convert a negative number to positive in JavaScript.
JavaScript // Javascript script // to convert negative number // to positive number // Function to convert // given number to // positive number function convert_positive(a) { return a < 0 ? (~a + 1) : a; } //Driver code let n = -10; let m = 5; // Call function n = convert_positive(n); // Print result console.log(n); // Call function m = convert_positive(m); // Print result console.log(m); To convert a negative number to its positive equivalent in JavaScript using Math.sqrt(), you can use the Math.sqrt() function along with the Math.pow() function.
Example: In this example, we are using Math.sqrt().
JavaScript function convertToPositive(number) { // Using Math.sqrt() and Math.pow() to convert a negative number to positive return Math.sqrt(Math.pow(number, 2)); } // Example usage const negativeNumber = -5; const positiveResult = convertToPositive(negativeNumber); console.log(positiveResult); // Output: 5 Similar Reads
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