C Program to convert a word from uppercase to lowercase and from lowercase to uppercase

on
UPPERCASE TO LOWERCASE
#include<stdio.h>
#include<conio.h>
#include<string.h>
int main()
{  clrscr(); 
int i;  char st[10]; 
printf(“Enter 1 word in uppercase “); 

scanf(“%s”,st);
  for(i=0;i<=strlen(st);i++) 

{    if(st[i]>=65 && st[i]<=92)     // ascii value of  A=65, a=97

   {    st[i]=st[i]+32;   }  }
  printf(“\nThe word in the Lowercase will be = %s”,st); 

getch(); 
return 0;
}

LOWERCASE TO UPPERCASE
#include<stdio.h>
#include<conio.h>
#include<string.h>
int main()
{  clrscr();  int i; 
char st[10]; 
printf(“Enter 1 word in lowercase “); 
scanf(“%s”,st);

  for(i=0;i<=strlen(st);i++) 

{    if(st[i]>=97 && st[i]<=122)  

 {    st[i]=st[i]-32;   } 

}
  printf(“\nThe word in the uppercase will be = %s”,st); 

getch(); 
return 0;
}


More Tutorials 

C Program to convert a word from uppercase to lowercase and from lowercase to uppercase