172. Can you predict the output of JAVASCRIPT code | The Stylish Coder |

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Predict the output of the JAVASCRIPT Program,
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Answer — [undefined, undefined, undefined]
Explanation —When mapping over the array, the value of num is equal to the element it’s currently looping over. In this case, the elements are numbers, so the condition of the if statement typeof num === "number" returns true. The map function creates a new array and inserts the values returned from the function.

However, we don’t return a value. When we don’t return a value from the function, the function returns undefined. For every element in the array, the function block gets called, so for each element, we return undefined.

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