JavaScript: Check whether the given argument is a string

JavaScript fundamental (ES6 Syntax): Exercise-187 with Solution

Check If String

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

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

Sample Solution:

JavaScript Code:

// Define a function 'isString' that checks if the type of value 'val' is 'string'
const isString = val => typeof val === 'string';

// Test case to check if the provided value is a string
console.log(isString('10')); // true ('10' is a string)

Output:

true

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-187-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that returns true if the provided value is a string using typeof and Object.prototype.toString.
• Write a JavaScript function that checks whether an argument is a string and distinguishes it from String objects.
• Write a JavaScript program that validates a variable’s type and confirms it is a string literal.
• Write a JavaScript function that tests an input with multiple type-check methods to determine if it is a string.

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