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How to use the Math.sqrt() Function In Javascript

Using for loop

The simplest approach to checking whether a number is a perfect square is to use the Math.sqrt() function. If the square root of a number results in an integer, then the number is a perfect square.

Example: It returns true if the input number is a perfect square (i.e., an integer that is the square of an integer), otherwise false. It also includes examples of usage demonstrating its functionality.

Javascript 
function isPerfectSquare(num) {
    if (num <= 0 || typeof num !== "number") {
        return false;
    }

    const sqrt = Math.sqrt(num);
    return Number.isInteger(sqrt);
}

const number1 = 16;
const number2 = 9;
const number3 = 15;

console.log(`${number1} is perfect square:
 ${isPerfectSquare(number1)}`);
console.log(`${number2} is perfect square:
 ${isPerfectSquare(number2)}`);
console.log(`${number3} is perfect square:
 ${isPerfectSquare(number3)}`);

Output
16 is perfect square: true
9 is perfect square: true
15 is perfect square: false

JavaScript Program to Check Whether a Number is Perfect Square

The number that results from squaring another integer is called a perfect square. A perfect square is a number that can be expressed as the product of an integer with itself. There are several ways available in JavaScript to check whether a number is a perfect square or not which are as follows:

Table of Content

  • Using the Math.sqrt() Function
  • Using for loop
  • Using binary search
  • Using prime factorization

Similar Reads

Using the Math.sqrt() Function

The simplest approach to checking whether a number is a perfect square is to use the Math.sqrt() function. If the square root of a number results in an integer, then the number is a perfect square....

Using for loop

One can iterate from 1 to the square root of the number using for loop and check if any integer square results in the given number....

Using binary search

A more optimized approach is to use binary search to find the square root of the number. We can narrow down the search range by halving it in each iteration....

Using prime factorization

Another approach to determine if a number is a perfect square involves prime factorization. If the prime factors of a number occur in pairs, then the number is a perfect square. This is because when you multiply these pairs together, you get the original number....

Tags:
#JavaScript-Numbers #JavaScript-Program #JavaScript #Web Technologies

Using for loop