JavaScript: Add two digits of a given positive integer of length two

JavaScript Basic: Exercise-81 with Solution

Add Two Digits in a Two-Digit Number

Write a JavaScript program to add two digits to a given positive integer of length two.

Visual Presentation:

Sample Solution:

JavaScript Code:

// Function to add the two digits of a number
function add_two_digits(n) {
    // Return the sum of the last digit and the result of dividing the number by 10 and rounding down
    return n % 10 + Math.floor(n / 10);
}	

// Example usage
console.log(add_two_digits(25));  // Output: 7 (2 + 5)
console.log(add_two_digits(50));  // Output: 5 (5 + 0)

Output:

7
5

Live Demo:

See the Pen javascript-basic-exercise-81 by w3resource (@w3resource) on CodePen.

Flowchart:

ES6 Version:

// Defining a function 'add_two_digits' that takes a number 'n' as an argument
const add_two_digits = (n) => {
    // Returning the sum of the last digit (n % 10) and the digit in the tens place (Math.floor(n / 10))
    return n % 10 + Math.floor(n / 10);
};
// Printing the result of calling the function 'add_two_digits' with the arguments 25 and 50
console.log(add_two_digits(25));
console.log(add_two_digits(50));

For more Practice: Solve these Related Problems:

• Write a JavaScript program that extracts the tens and units digits from a two-digit number and returns their sum.
• Write a JavaScript function that takes a two-digit integer and computes the sum of its digits, ensuring proper type conversion.
• Write a JavaScript program that validates a number is two-digit and then adds its individual digits together.

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