Question No.5

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 Solved by WAJID

#include
#include
#include

void main(void)
{
do{
cout<<"Enter a letter : \xdb\t"< cout< cout<<"\n !Press c to continue or any key to exit."< }while(getch()=='c');
}