Javascript Incrementing

The Increment operator (++) increments its operand by one.

If used as a postfix, then it returns the value before incrementing.

If used as a prefix, then it returns the value after incrementing.

postfix

var a = 5, 
 b = a++, 
 c = a

Output

In this case, a is incremented after setting b. So, b will be 5, and c will be 6.

prefix

var a = 5, 
 b = ++a, 
 c = a

Output

In this case, a is incremented before setting b. So, b will be 6, and c will be 6.

The increment and decrement operators are commonly used in for loops, for example:

for(var i = 0; i < 42; ++i)
{
 // do something awesome!
}

Math.pow() or **

Exponentiation makes the second operand the power of the first operand (ab).

var a = 2,
 b = 3,
 c = Math.pow(a, b);

Output

c will now be 8

let a = 2,
 b = 3,
c = a ** b;

Output

c will now be 8

Use Math.pow to find the nth root of a number.

Finding the nth roots is the inverse of raising to the nth power. For example 2 to the power of 5 is 32. The 5th root of 32 is 2.

Math.pow(v, 1 / n); // where v is any positive real number
                    // and n is any positive integer
var a = 16;
var b = Math.pow(a, 1 / 2); // return the square root of 16 = 4
var c = Math.pow(a, 1 / 3); // return the cubed root of 16 = 2.5198420997897464
var d = Math.pow(a, 1 / 4); // return the 4th root of 16 = 2

Conclusion

In this page (written and validated by A. Gawali) you learned about Javascript Incrementing . What's Next? If you are interested in completing Javascript tutorial, your next topic will be learning about: Javascript Addition and Subtraction.

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