JavaScript: Check whether 1 appears in first or last position of a given array of integers
JavaScript Basic: Exercise-71 with Solution
Write a JavaScript program to check whether 1 appears in the first or last position of a given array of integers. The array length must be larger than or equal to 1.
The program verifies if the number 1 is present at either the first or last position of an array of integers, ensuring the array's length is at least 1. If the condition is met, it returns true; otherwise, it returns false.
Visual Presentation:
Sample Solution:
JavaScript Code:
// Define a function named first_last_1 with a parameter nums
function first_last_1(nums)
{
// Calculate the index of the last element in the array
var end_pos = nums.length - 1;
// Check if the first or last element in the array is equal to 1, and return the result
return nums[0] == 1 || nums[end_pos] == 1;
}
// Call the function with sample arguments and log the results to the console
console.log(first_last_1([1, 3, 5]));
console.log(first_last_1([1, 3, 5, 1]));
console.log(first_last_1([2, 4, 6]));
Output:
true true false
Live Demo:
See the Pen JavaScript - Check whether 1 appears in first or last position of a given array of integers - basic-ex-71 by w3resource (@w3resource) on CodePen.
Flowchart:
ES6 Version:
// Define a function named first_last_1 with a parameter nums using arrow function syntax
const first_last_1 = nums => {
// Use the logical OR operator to check if the first or last element of the array is equal to 1
return nums[0] === 1 || nums[nums.length - 1] === 1;
};
// Call the function with sample arguments and log the results to the console
console.log(first_last_1([1, 3, 5]));
console.log(first_last_1([1, 3, 5, 1]));
console.log(first_last_1([2, 4, 6]));
Improve this sample solution and post your code through Disqus.
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