Any character is entered through the keyboard, write a C program to determine whether the character entered is a capital letter, a small case letter, a digit or a special symbol.
The following table shows the range of ASCII values for various characters:
Character A – Z : ASCII Value 65 – 90
Character a – z : ASCII Value 97 – 122
Character 0 – 9 : ASCII Value 48 – 57
Special Symbol : ASCII Value 0 – 47, 58 – 64, 91 – 96, 123 – 127
Related Read:
else if statement in C
Relational Operators In C
C Program To Print All ASCII Characters and Code
Expected Output for the Input
User Input:
Enter a Character
$
Output:
$ is a Special Character
Video Tutorial: C Program To Check For Alphabet, Number or Special Symbol
[youtube https://www.youtube.com/watch?v=NBcG-r0P9P8]
Source Code: C Program To Check For Alphabet, Number and Special Symbol
#include<stdio.h>
int main()
{
char ch;
printf("Enter a Character\n");
scanf("%c", &ch);
if(ch >= 65 && ch <= 90)
{
printf("%c is an Uppercase Alphabet\n", ch);
}
else if(ch >= 97 && ch <= 122)
{
printf("%c is an lowercase Alphabet\n", ch);
}
else if(ch >= 48 && ch <= 57)
{
printf("%c is a Number\n", ch);
}
else if( (ch >= 0 && ch <= 47) ||
(ch >= 58 && ch <= 64) ||
(ch >= 91 && ch <= 96) ||
(ch >= 123 && ch <= 127))
{
printf("%c is a Special Character\n", ch);
}
return 0;
}
Output 1:
Enter a Character
A
A is an Uppercase Alphabet
Output 2:
Enter a Character
i
i is an lowercase Alphabet
Output 3:
Enter a Character
8
8 is a Number
Output 4:
Enter a Character
$
$ is a Special Character
Logic To Check For Alphabet, Number and Special Symbol
We use &&(AND) operator check check for range. i.e., for number, we check from the range 48 to 57. To check if the user entered character lies in this range we use (ch >= 48 && ch <= 57). To check for multiple ranges we use ||(OR) operator. For example, for special symbol:
(ch >= 0 && ch <= 47) ||
(ch >= 58 && ch <= 64) ||
(ch >= 91 && ch <= 96) ||
(ch >= 123 && ch <= 127)
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