C Program to Find ASCII Value of a Character

What is ASCII value ?

In C programming, when we store a character variable then the variable does not store the character itself , it stores the ASCII value (an integer number between 0 and 127) of that character.

For example,
the ASCII value of 'I' is 73.

It means, when we store the character 'I' in a variable then the integer value 73 is stored in that variable rather than itself.

Program to Print ASCII Value

#include <stdio.h>

int main() { 
  char a;
  printf("Enter a character : ");
  scanf("%c", &a);
  printf("ASCII value of %c = %d", a, a);
  return 0;
}

Output

Enter a character : r
ASCII value of r = 114

Working of the above program

• First we declare a character variable a to store character entered by the user.

char a;

• Then we asked the user to enter a character.

printf("Enter a character : ");

• Then we take the user input using scanf() function and store the entered value in variable a.

scanf("%c", &a);

• Finally, we print the value of variable a using %c format specifier and %d to print the integer ASCII value in printf() function.

printf("ASCII value of %c = %d", a, a);