JavaScript: Check whether the given argument is a function

JavaScript fundamental (ES6 Syntax): Exercise-198 with Solution

Write a JavaScript program to check whether the given argument is a function.

• Use typeof to check if a value is classified as a function primitive.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const isFunction = val => typeof val === 'function';

console.log(isFunction('x'));
console.log(isFunction(x => x));

Sample Output:

false
true

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-198-1 by w3resource (@w3resource) on CodePen.

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