JavaScript: Get a boolean determining if the passed value is primitive or not

JavaScript fundamental (ES6 Syntax): Exercise-190 with Solution

Check If Primitive

Write a JavaScript program to return a boolean determining if the passed value is primitive or not.

• Create an object from val and compare it with val to determine if the passed value is primitive (i.e. not equal to the created object).

Sample Solution:

JavaScript Code:

// Define a function 'isPrimitive' that checks if the given value 'val' is a primitive type
const isPrimitive = val =>
  // Check if the type of the value is not 'object' or 'function', or if the value is null
  !['object', 'function'].includes(typeof val) || val === null;

// Test cases to check if the values are primitive types
console.log(isPrimitive(null)); // true (null is a primitive type)
console.log(isPrimitive(50)); // true (number is a primitive type)
console.log(isPrimitive('Hello!')); // true (string is a primitive type)
console.log(isPrimitive(false)); // true (boolean is a primitive type)
console.log(isPrimitive(Symbol())); // true (symbol is a primitive type)
console.log(isPrimitive([])); // false (array is not a primitive type)

Output:

true
true
true
true
true
false

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-190-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that returns true if a given value is a primitive type (string, number, boolean, symbol, null, or undefined).
• Write a JavaScript function that checks if an input is not an object or function and returns a boolean accordingly.
• Write a JavaScript program that distinguishes between primitive and reference types using typeof and instanceof.
• Write a JavaScript function that verifies if a variable is one of the known primitive types, excluding objects.

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