toupper: returns the uppercase equivalent of ch if ch is a letter or ch is returned unchanged : toupper « ctype.h « C / ANSI-C

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C / ANSI-C » ctype.h » toupper Screenshots  toupper: returns the uppercase equivalent of ch if ch is a letter or ch is returned unchanged      //Declaration:  int toupper(int ch);  //Function:     returns the uppercase equivalent of ch if ch is a letter or ch is returned unchanged.     #include <ctype.h> #include <stdio.h> int main(void){   putchar(toupper('a')); }           /* A*/                      Related examples in the same category

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