Answer to Question #28121 in C++ for ba

Question

5. A library function, islower(), takes a single character (a letter) as an argument and returns a
nonzero integer if the letter is lowercase, or zero if it is uppercase. This function requires the header
file CTYPE.H. Write a program that allows the user to enter a letter, and then displays either zero or
nonzero, depending on whether a lowercase or uppercase letter was entered. (See the SQRT
program for clues.)

Answer 1

#include<iostream>
#include<ctype.h>
using namespace std;

int main()
{
char letter;

cout<<"Enter letter : ";
cin>>letter;
if(islower(letter) == 0)
& cout<<"letter is uppercase\n";
else
& cout<<"letter is lowercase\n";

return 0;
}