How to unset a JavaScript variable?

1.	How to unset a JavaScript variable?
Answer» Generally, in JavaScript we create functions USING the function KEYWORD: var points = [98, 45, 78, 65, 99]; var DEMO = points.map(function(val) { return val + val; }) Using the Fat arrow function REDUCES line of code and even avoids you to write the keyword “function” again and again. The syntax of fat arrow function includes =>, wherein it shows fat arrow: ARG => exp For multiple arguments: (arg1 [, arg2]) => exp Let’s see what you need to do with fat arrow function while implementing the code snippet we saw above: var points = [98, 45, 78, 65, 99]; var demo = points.map((val) => val+val);

Answer»

Generally, in JavaScript we create functions USING the function KEYWORD:

var points = [98, 45, 78, 65, 99]; var DEMO = points.map(function(val) { return val + val; })

Using the Fat arrow function REDUCES line of code and even avoids you to write the keyword “function” again and again.

The syntax of fat arrow function includes =>, wherein it shows fat arrow:

ARG => exp

For multiple arguments:

(arg1 [, arg2]) => exp

Let’s see what you need to do with fat arrow function while implementing the code snippet we saw above:

var points = [98, 45, 78, 65, 99]; var demo = points.map((val) => val+val);

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