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# C - isupper function

## Synopsis:

    #include <stdio.h>

    int isupper(int c);

## Description:

The function returns nonzero if c is any of:

    A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

## Return Value

The function returns nonzero if c is upper case otherwise this will return zero which will be equivalent to false.

## Example

    #include <stdio.h>

    int main() {

      if( isupper( 'a' ) )
      {
         printf( "Character a is upper case\n" );
      }
      if( isupper( 'A' ) )
      {
         printf( "Character A is upper case\n" );
      }
      return 0;
    }

It will proiduce following result:

    Character A is upper case

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