In this article, we will see how we can convert a negative number to a positive number in javascript by the methods described below.
Method 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 numberfunction 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 codelet n = -10;let m = 5;// Call functionn = convert_positive(n);// Print resultconsole.log(n);// Call functionm = convert_positive(m);// Print resultconsole.log(m); |
Output:
10 5
Method 2: 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 codelet n = -30;let m = 15;// Using Math.abs() functionn = Math.abs(n);// Print resultconsole.log(n);// Using Math.abs() functionm = Math.abs(m);// Print resultconsole.log(m); |
Output:
30 15
Method 3: 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 numberfunction convert_positive(a) { return a < 0 ? -(a) : a;}//Driver codelet n = -10;let m = 5;// Call functionn = convert_positive(n);// Print resultconsole.log(n);// Call functionm = convert_positive(m);// Print resultconsole.log(m); |
Output:
10 5
Method 4: 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:
Javascript
// Javascript script// to convert negative number// to positive number// Function to convert// given number to// positive numberfunction convert_positive(a) { return a < 0 ? (~a + 1) : a;}//Driver codelet n = -10;let m = 5;// Call functionn = convert_positive(n);// Print resultconsole.log(n);// Call functionm = convert_positive(m);// Print resultconsole.log(m); |
Output:
10 5
