I always found the old way of writing an exponentiation expression a bit awkward. Luckily, the exponentiation operator was introduced. This syntax also makes it more similar to other languages (ie. Ruby, Python). Cool π

``````// Old way
const old = Math.pow(3, 7);
// 2187

// β ES7 way
const es7 = 3 ** 7;
// 2187

``````

## Infix Notation

The use of `**` is called infix notation. It is characterized by the placement of operators between operands. Other popular infix notations include: `+` or `-`.

The reason this syntax was introduced is because:

Infix notation is more succinct than function notation, which makes it more preferable## Exponentiation in Other Languages

Also, you will notice this syntax is very similar to other languages:

``````// Python
a ** b

// Ruby
a ** b

// Perl
a ** b

// F#
a ** b

``````

I actually like that itβs similar to other languages. Because it makes picking up JavaScript a lot of easier for those folks and they can be up and running very quickly.

## Assignment Operator

You must have seen arithmetic operator combined with the assignment operator. For example `+=`:

``````a += b

// Same as
// a = a + b

``````

Well, similarly, this can also be done with the exponentiation operator. `**=`:

``````a **= b

// Same as
// a = a ** b

``````

## Negative Base

Thereβs one bit of a gotcha. When you have a negative base, you will have to wrap it around parenthesis.

``````// β Syntax Error
const wrong = -3 ** 7;

// β
const correct = (-3) ** 7;

``````

However, this isnβt an issue if you use the older function way.

``````const works = Math.pow(-3, 7);

``````

## Resources

#javascript #web-development

13.65 GEEK