JavaScript: Compute the sum of three elements of a given array of integers of length 3

JavaScript Basic: Exercise-69 with Solution

Sum of 3 Elements in Array (Length 3)

Write a JavaScript program to compute the sum of three elements of a given array of integers of length 3.

The program takes an array of three integers as input and calculates the sum of these three elements. It then returns or displays the resulting sum.

Visual Presentation:

Sample Solution:

JavaScript Code:

// Define a function named sum_three that takes an array of three numbers as a parameter
function sum_three(nums) {
    // Return the sum of the three numbers using array indexing
    return nums[0] + nums[1] + nums[2];
}

// Call the function with different arrays and log the results to the console
console.log(sum_three([10, 32, 20]));
console.log(sum_three([5, 7, 9]));
console.log(sum_three([0, 8, -11]));

Output:

62
21
-3

Live Demo:

Flowchart:

ES6 Version:

// Define a function named sum_three with a parameter nums using arrow function syntax
const sum_three = nums => {
    // Use destructuring assignment to get individual elements of the array
    const [num1, num2, num3] = nums;
    // Return the sum of the three numbers
    return num1 + num2 + num3;
};

// Call the function with sample arguments and log the results to the console
console.log(sum_three([10, 32, 20]));
console.log(sum_three([5, 7, 9]));
console.log(sum_three([0, 8, -11]));

For more Practice: Solve these Related Problems:

• Write a JavaScript program that sums the three elements of an array only if the array length is exactly 3, otherwise returns an error.
• Write a JavaScript function that accepts an array of three integers and computes their sum using a loop or reduce method.
• Write a JavaScript program that validates the length of an array before calculating the sum of its three elements.

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