Write a C program to find out sum of first and last digit of a given number

Write a C program to find product of digits of a number using while loop.
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In this blog post, we learn how to write a C Program to find sum of first and last digit of a number?. We will write the C program to find sum of first and last digit of a number using the Arithmetic Operators. Here we will calculate the sum of first and last digit of a number using the loop and without using the loop. Let see an example,

Sum of first and last digits of 4824 = 4 + 4 = 8

Below is a program to find out sum of first and last digit of a given number:

  •  Program:

#include<stdio.h>
#include<conio.h>

int main()
{
    int num, sum=0, Firstdigit, Lastdigit;

    printf("Enter any number : ");
    scanf("%d",&num);

    Lastdigit = num % 10;
    Firstdigit = num;

    while(num >= 10)
    {
        num = num / 10;
    }
    Firstdigit = num;
    sum = Firstdigit + Lastdigit;

    printf("Sum of first and last digit : %d", sum);

    return 0;
}

  •  Output:

Enter any number : 2463 Sum of first and last digit : 5

  •  Explain:


  1. Input a number from user. Store it in some variable say  'num'.
  2. To find last digit of given number we modulo divide the given number by '10'. Which is 'Lastdigit = num % 10'.
  3. To find first digit we divide the given number by '10' till 'num is greater than 0'.
  4. Finally calculate sum of first and last digit i.e. 'sum = Firstdigit + Lastdigit'.

 

  •  Visit:

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