JavaScript: Check whether the first and last elements are equal of a given array of integers length 3

JavaScript Basic: Exercise-72 with Solution

Write a JavaScript program to check whether the first and last elements are the same in a given array of integers of length 3.

Visual Presentation:

Sample Solution:

JavaScript Code:

// Define a function named first_last_same with a parameter nums
function first_last_same(nums) {
    // Calculate the index of the last element in the array
    var end = nums.length - 1;

    // Check if the array has at least one element
    if (nums.length >= 1) {
        // Return true if the first and last elements of the array are equal, otherwise return false
        return nums[0] == nums[end];
    } else {
        // Return false if the array is empty
        return false;
    }
}

// Call the function with sample arguments and log the results to the console
console.log(first_last_same([10, 20, 30])); 
console.log(first_last_same([10, 20, 30, 10])); 
console.log(first_last_same([20, 20, 20])); 

Output:

false
true
true

Live Demo:

See the Pen JavaScript - check whether the first and last elements are equal of a given array of integers length 3 - basic-ex-72 by w3resource (@w3resource) on CodePen.

Flowchart:

ES6 Version:

// Define a function named first_last_same with a parameter nums using arrow function syntax
const first_last_same = nums => {
    // Store the last index of the array
    const end = nums.length - 1;

    // Check if the array has at least one element
    if (nums.length >= 1) {
        // Use the equality operator (==) to compare the first and last elements
        return nums[0] === nums[end];
    } else {
        // Return false if the array is empty
        return false;
    }
};

// Call the function with sample arguments and log the results to the console
console.log(first_last_same([10, 20, 30]));
console.log(first_last_same([10, 20, 30, 10]));
console.log(first_last_same([20, 20, 20])); 

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