toupper() - ctype.h
The C library function int toupper(int c) converts lowercase letter to uppercase.
This function returns uppercase equivalent to c, if such value exists, else c remains unchanged. The value is returned as an int value that can be implicitly casted to char.
Syntax
int toupper(int c);
Example
#include
#include
int main()
{
int i = 0;
char c;
char str[] = "Tutorials Point";
while(str[i])
{
putchar (toupper(str[i]));
i++;
}
return(0);
}
Output / Return Value
TUTORIALS POINT
Limitations
Alternatives / See Also
Reference