JavaScript: Swap the first and last elements of a given array of integers
JavaScript Basic: Exercise-80 with Solution
Write a JavaScript program to swap the first and last elements of a given array of integers. The array length should be at least 1.
Visual Presentation:
Sample Solution:
JavaScript Code:
// Function to swap the first and last elements of an array
function swap(arra) {
// Destructuring assignment to swap values without using a temporary variable
[arra[0], arra[arra.length - 1]] = [arra[arra.length - 1], arra[0]];
// Return the modified array
return arra;
}
// Example usage
console.log(swap([1, 2, 3, 4]));
console.log(swap([0, 2, 1]));
console.log(swap([3]));
Output:
[4,2,3,1] [1,2,0] [3]
Live Demo:
See the Pen JavaScript - swap the first and last elements of a given array of integers - basic-ex-80 by w3resource (@w3resource) on CodePen.
Flowchart:
ES6 Version:
// ES6 version using array destructuring and swapping
const swap = (arra) => {
[arra[0], arra[arra.length - 1]] = [arra[arra.length - 1], arra[0]];
return arra;
};
// Example usage
console.log(swap([1, 2, 3, 4]));
console.log(swap([0, 2, 1]));
console.log(swap([3]));
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