American Standard Code for Information Interchange(ASCII) is a standard of character encoding for electronic communication. ASCII codes are universally used as a way to represent text in computers, networking equipment, and other various types of devices like IoTs and HHDs, etc. 

Usually, ASCII codes are written in 8 bits binary notations in case of binary arithmetics to represent different characters including upper case and lowercase alphabets as well as special symbols.

To print the ASCII Code in C Programming language, you can use different ways.

  • Take a character from the user and print ASCII of it.
  • Print all ASCII values
  • Print ASCII values between some range.

1. Get Character from the user and print ASCII Value of that character

#include<stdio.h>
void main()
{
    int e;
    char character;
    clrscr();
    printf("\n Enter a character of your choice: ");
    scanf("%c",&character);
    e=character;
    printf("\n The ASCII value of the character you've entered is : %d",e);
    getch();
}

One thing you should always consider while playing with ASCII is that the ASCII values of all the characters will be between 0 and 255. That’s why we need to use a loop starting at 0 and iterating up to 255 to print all characters in range 0 to 255.

For example, the following is the ASCII Table that shows ASCII of different characters and their equivalent values in a different number systems.

Image Source: https://www.kindpng.com/

Below is a table for non-printable ASCII Characters.

Image Source: https://www.fpds.gov/

2. To print ASCII of all characters and symbols

#include <stdio.h>
void main()
{
  int e;
  for(e = 0; e <= 255; i++){
    printf("The ASCII value of %c = %d\n", e, e);
   }
  getch();	
}


At the point when value of e is 65, it will print
The ASCII value of A = 65

3. To Print ASCII of characters in the range, one shall go with the following idea.

#include <stdio.h>
void main()
{
  int e;
  for(e = 65; e <= 90; i++){
    printf("The ASCII value of %c = %d\n", e, e);
   }
  getch();	
}

To print UPPER CASE english alphabets.
#include <stdio.h>
void main()
{
  int e;
  for(e = 97; e <= 122; i++){
    printf("The ASCII value of %c = %d\n", e, e);
   }
  getch();	
}



To print lower case english alphabets.

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