isupper() - Character Function
How is "isupper()" used in C++?
Explanation
isupper() character function is used to check if the argument contains uppercase letters (A-Z). This function returns zero if uppercase letters (A-Z) are not found.
int isupper( int c );
Result :
xxxx.
In the above example, it is used to check the uppercase letters (A-Z) and replace it with lowercase "x". The character check is made using the ctype facet.
Syntax:
int isupper( int c );
Example :
| #include <stdio.h> #include <ctype.h> int main () { char arr[]="ABCD.\n"; char c; for (int i=0; arr[i]!=' ' ; ) { if (isupper(c)) { c='x'; putchar (c);} i++; } return 0; } |
Result :
xxxx.
In the above example, it is used to check the uppercase letters (A-Z) and replace it with lowercase "x". The character check is made using the ctype facet.
