Write a C program to change the Character from its uppercase to lowercase or vice versa.

#include<stdio.h>
int main()
{
char a; 
printf ( "Enter A Character : ");
scanf("%c",&a);
if(a>=65&&a<=90)
{
a=a+32;
printf("%c",a);
}
if(a>=97&&a<=122)
{
a=a-32;
printf("%c",a);
}
return 0;
}


OUTPUT

Enter A Character :  S

 s

NB : It is done using the concept of ASCII value .