**Write a C program to enter a number and find sum of first and last digits of a number.**

Wap in C to find sum of least significant and most significant digit of a number.

Wap in C to find sum of least significant and most significant digit of a number.

#### Required Knowledge

To get the least significant digit of a number we will use '%' modulus operator. Number%10 will give the least significant digit of the number. Then we will remove one digit at a time form number using below mentioned algorithm and then store the most significant digit in firstDigit variable.

**Sum of first and last digits** of 2534 = 2 + 4 = 6

**Algorithm to find first and last digits of a number**

- Get least significant digit of number (number%10) and store it in lastDigit variable.
- Remove least significant digit form number (number = number/10).
- Repeat above two steps, till number is greater than 10.
- The remaining number is the first digit of number.

## C program to find sum of first and last digits of a number

#include <stdio.h> int main() { int num, temp, firstDigit, lastDigit; /* * Take a number as input from user */ printf("Enter a Number\n"); scanf("%d", &num); temp = num; /* get last digit of num */ lastDigit = num %10; while(num > 10){ /* Keep on removing the last digit untill num becomes less than 10(single digit) */ num = num/10; } firstDigit = num; printf("Sum of first and last digit of %d = %d", temp, firstDigit+lastDigit); getch(); return 0; }

Output

Enter a Number 2436 Sum of first and last digit of 2436 = 8

Enter a Number 2222 Sum of first and last digit of 2222 = 4