Anonymous function in javascript

Question

What is anonymous function in javascript?explain with an example.

Answer 1

It's a function that was declared but not assigned to any name indentifier, thus, it cannot be used again after its initial declaration.

A non-anonymous function would be written as:
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function hello(){ return 'hello' }
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or

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const hello = () = { return 'hello' }
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A anonymous function would be written as:

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function() { return 'anonymous' }
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or

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() = { return 'anonymous'}
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It has many uses but 90% of the time you'll use it in Higher Order Functions as an argument, for example, doubling all numbers of an array with the map method:

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const nums = [1, 2, 3]
//Double all numbers with an anonymous arrow function
const doubles = nums.map( num => { return num * 2} )

//Output [2, 4, 9]
console.log(doubles)
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Answer 2

wow!thanks!👍👍👍

Answer 3

Hey, just noticed a mistake. The output should be [2, 4, 6], lol. Anonymous functions are also common as callbacks. Sorry!

Answer 4

lol..its ok 😂😅