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 :sup:y), and it is identical to the x**y operation. The pow name refers to the operation to the power of.

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

   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.

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

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

   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)

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

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

   [ 1.4142135623730951, 4, 10, 11 ]