text: #include<stdio.h>
  void tolower(char);
  int main()
  {
  	char ch;
  	printf("Enter the Alphabet: ");
  	scanf("%c",&ch);
  	tolower(ch);
  	return 0;
  }
  void tolower(char ch)
  {
  	if(ch>=65&&ch<=91)
  	{	ch=ch+32;
  		printf("The lowercase : %c\n",ch);
  	}
  	else
  		printf("The Alphabet is already in lowercase.\n");
  }
  