JavaScript: Find if an array contains a specific element

JavaScript Array: Exercise-32 with Solution

Find Element in Array

Write a JavaScript function to find an array containing a specific element.

Test data:
arr = [2, 5, 9, 6];
console.log(contains(arr, 5));
[True]

Visual Presentation:

Sample Solution:

JavaScript Code:

// Function to check if an array contains a specific element
function contains(arr, element) {
 // Iterate through the array
 for (var i = 0; i < arr.length; i++) { // Check if the current element is equal to the target element if (arr[i] === element) { // Return true if the element is found in the array return true; } } // Return false if the element is not found in the array return false; } // Sample array arr = [2, 5, 9, 6]; // Output the result of checking if the array contains the element '5' console.log(contains(arr, 5)); 

Output:

true

Flowchart:

ES6 Version:

// Function to check if an array contains a specific element
const contains = (arr, element) => {
 // Iterate through the array using the Array.prototype.some method
 return arr.some(item => item === element);
};
// Sample array
const arr = [2, 5, 9, 6];
// Output the result of checking if the array contains the element '5'
console.log(contains(arr, 5));

Live Demo:

See the Pen JavaScript - Find to if an array contains a specific element- array-ex- 32 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that checks if an array contains a specific element using includes() and returns a boolean.
• Write a JavaScript function that returns the index of a given element if it exists, or -1 if it does not.
• Write a JavaScript function that iterates through an array to find and return true if a particular element is found.
• Write a JavaScript function that searches an array of objects for an object with a specific property value.

Go to:

• JavaScript array Exercises Home ↩
• JavaScript Exercises Home ↩

PREV : Remove Specific Element.
NEXT : Empty Array.

Contribute your code and comments through Disqus.