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C Exercises: Check whether a character is an alphabet, digit or special character

C Conditional Statement: Exercise-16 with Solution

Write a C program to check whether a character is an alphabet, digit or special character.

Pictorial Presentation:

Check whether a character is an alphabet, digit or special character

Sample Solution:

C Code:

#include <stdio.h>
int main()  
{  
    char sing_ch;  

    printf("Input a character: ");  
    scanf('%c', &sing_ch);  
  
    /* Checks whether it is an alphabet */  
    if((sing_ch>='a' && sing_ch<='z') || (sing_ch>='A' && sing_ch<='Z'))  
    {  
        printf("This is an alphabet.\n");  
    }  
    else if(sing_ch>='0' && sing_ch<='9') /* whether it is digit */  
    {  
        printf("This is a digit.\n");  
    }  
    else /* Else special character */  
    {  
        printf("This is a special character.\n");  
    }  
}

Sample Output:

Input a character: @                                                                                          
This is a special character.

Flowchart:

Flowchart: Check whether a character is alphabet, digit or special character

C Programming Code Editor:

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP