JavaScript: Find if an array contains a specific element

Last update on March 03 2025 12:46:12 (UTC/GMT +8 hours)

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:

JavaScript: Find if an array contains a specific element

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:

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.

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