C Program To Convert Uppercase To Lowercase.

25) Sample C Program to accept a character in Uppercase & print in Lowercase.

# include <stdio.h>
# include <conio.h>
main( )
{
char ch, c1;
clrscr( );

printf("Enter a character in Uppercase:");
ch = getchar();

c1 = ch + 32;

printf("The given character in Lowercase is:");
putchar(c1);

getch();
}


26) Sample C Program to accept a character in any case and print it in another case.

# include <stdio.h>
# include <conio.h>
main( )
{
char ch, c1;
clrscr( );

printf("Enter a character in any case(Uppercase/Lowercase):");
ch = getchar();

if(ch >= 65 && ch <= 90)
   c1 = ch + 32;
elseif(ch >= 97 && ch <= 122)
   c1 = ch - 32;
endif;

printf("The given char in other case is:");
putchar(c1);

getch();
}



27) Sample C Program to print natural number from 1 to 10 by using while loop.

# include <stdio.h>
# include <conio.h>
main( )
{
int a = 0;
clrscr();

while( a < 10)
  {
     a = a + 1;
     printf("%d\n",a);
  }

getch();
}