w3resource

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 equal of a given array of integers length 3.

Pictorial Presentation:

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

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to check whether the first and last elements are equal of a given array of integers length 3</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function first_last_same(nums)
   {
    var end = nums.length - 1;
    if (nums.length >= 1){
       return nums[0] == nums[end];
    } else {return false;}
}

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])); 

Sample Output:

false
true
true

Flowchart:

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

ES6 Version:

function first_last_same(nums)
   {
    const end = nums.length - 1;
    if (nums.length >= 1){
       return nums[0] == nums[end];
    } else {return false;}
}

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]));

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.


Contribute your code and comments through Disqus.

Previous: Write a JavaScript program to check whether 1 appears in first or last position of a given array of integers.
Next: Write a JavaScript program to reverse the elements of a given array of integers length 3.

What is the difficulty level of this exercise?



JavaScript: Tips of the Day

Classes/function constructors

class Person {
  constructor() {
    this.name = 'Owen';
  }
}

Person = class AnotherPerson {
  constructor() {
    this.name = 'Eddie';
  }
};

const member = new Person();
console.log(member.name);

We can set classes equal to other classes/function constructors. In this case, we set Person equal to AnotherPerson. The name on this constructor is Eddie, so the name property on the new Person instance member is "Eddie".

Ref: https://bit.ly/3jFRBje