toupper Function

If the character is a lowercase character (a to z), then it is converted to uppercase (A to Z) character.

It returns the uppercase equivalent of ch if ch is a letter or ch is returned unchanged.

Syntax :

int toupper(int ch);

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Example

#include <ctype.h>

#include <stdio.h>

  void main() {

	char b,ch='a';

	b=toupper(ch);

	printf("uppercase is: %c",b);

}

Output

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