Math.pow and Math.sqrt Examples

Math.pow

The general syntax for this method is:

Math.pow(x, y)

This method calculates and returns the value of x raised to the power of y (x ^y), and it is identical to the x**y operation. The pow name refers to the operation to the power of.

Example

console.log(3**4);
console.log(Math.pow(3,4));
//3 raised to the power of 4 = 3*3*3*3

Console Output

81
81

Math.sqrt

The general syntax for this method is:

Math.sqrt(number)

This method calculates and returns the square root of number, and it is a shortcut for using the fraction 1/2 in the pow method.

Numerical strings can also be evaluated, but should be avoided as a best practice.

Example

console.log(Math.sqrt(81));
console.log(Math.pow(81,1/2));

console.log(Math.sqrt(111));
console.log(Math.sqrt("36"));

Console Output

9
9
10.535653752852738
6

Math.sqrt also works on arrays, but must be combined with the map array method. The syntax for this is:

arrayName.map(Math.sqrt)

Example

let numbers = [2, 16, 100, 121];

console.log(numbers.map(Math.sqrt));

Console Output

[ 1.4142135623730951, 4, 10, 11 ]