C program to find Sum of First and Last Digits of a Number
% or the mod operator is used to find the remainder of division operation.
Below is a program to find sum of first and last digits of the user input number.
printf("\n\n\t\tStudytonight - Best place to learn\n\n\n");
int input, firstNumber, lastNumber;
printf("Enter a number: ");
gives remainder when the input value is divided by 10
i.e. the digit at units place
lastNumber = input%10;
firstNumber = input;
while(firstNumber >= 10)
firstNumber /= 10; // same as firstNumber = firstNumber/10
printf("\n\n\nAddition of first and last number is: %d + %d = %d\n", firstNumber, lastNumber, firstNumber+lastNumber);
printf("\n\n\t\t\tCoding is Fun !\n\n\n");