C program to find the ASCII value of a character

In this post, you will learn how to find the ASCII value of a character in the C programming language.

ASCII stands for American Standard Code for Information Interchange. It is a character encoding that uses numeric codes to represent characters. Each letter is assigned a number between 0 and 127. An upper case and lower case character are allocated different numbers. For example, the character 'A' is assigned the decimal number 65, while 'a' is assigned decimal 97.

When a PC sends information, the keys you press or the content you send and receive are sent as a bunch of numbers. These numbers represent the characters you typed or produced. Since the scope of standard ASCII is 0 to 127, it just requires 7 bits or 1 byte of data.

C Program to display the ASCII value of a character entered by the user

The given C program takes the character entered by the user and displays the ASCII value of it. When we use the %d format specifier for a char variable, then it displays the ASCII value of a char.

#include <stdio.h>
int main()
{
    char chr;
    printf("Enter any character: ");

    scanf("%c", &chr);

    printf("ASCII value of character %c is: %d", chr, chr);
    return 0;
}

Enter any character: F
ASCII value of character F is: 70

Enter any character: O
ASCII value of character O is: 79

C program to find ASCII values of all characters

If you want to know the ASCII values of all characters between 0 and 50, we can iterate over this range using a for loop and know their ASCII values.

#include <stdio.h>

int main()
{
  int i;

  for(i=0;i<=50;i++)
   {
    printf("The ASCII value of %c = %d\n",i,i);
   }
  return 0;
}

C Program to display the ASCII value of a string entered by the user

In the given example, we have asked the user to enter a string and used the while loop to find the ascii value of each character in the string.

#include <stdio.h>  
int main()  
{  
    // variable initialization 
    char name[20];   
    int i=0;  
    printf("Please enter a name: ");  
    scanf("%s", name);  
    while(name[i]!='\0')  // while loop  
    {  
        printf("\nThe ascii value of the character %c is %d", name[i],name[i]);  
        i++;  
    }  
    return 0;  
} 

Please enter a name: Priska
The ascii value of the character P is 80
The ascii value of the character r is 114
The ascii value of the character i is 105
The ascii value of the character s is 115
The ascii value of the character k is 107
The ascii value of the character a is 97

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