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Answer on C++ Question for Vicky

Question #26122

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.

Expert's answer

#include <stdio.h>
#include <ctype.h>

int main()
{
    int ch;
    printf("Enter a character: ");
    ch = getchar();
    
    if (islower(ch))
        puts("0");
    else
        puts("1");
    return 0;
}

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