Change the letter if it is in lower case to upper and vice-versa

Change the letter if it is in lower case to upper and vice-versa

/*WAP to change the letter if it is in lower case to upper and vice-versa*/

#include<stdio.h>

#include<conio.h>

void main()

{

char ch;

clrscr();

printf("enter the letter:");

scanf("%c",&ch);

if(ch>=65 && ch<=92)

{

ch=ch+32;

printf("letter is in upper case and its lower case is %c",ch);

}

else if(ch>=96 && ch<=122)

{

ch=ch-32;

printf("letter is in lower case and its upper case is %c",ch);

}

else

printf("INVALID LETTER");

getch();

}

OUTPUT:

enter the letter:g

letter is in lower case and its upper case is G