C program to convert the string from upper case to lower case.

source code

#include<stdio.h>

#include<string.h>

int main(){

  char str[20];

  int i;

  printf("Enter any string->");

  scanf("%s",str);

  printf("The string is->%s",str);

  for(i=0;i<=strlen(str);i++){

      if(str[i]>=65&&str[i]<=90)

       str[i]=str[i]+32;

  }

  printf("\nThe string in lower case is->%s",str);

  getch();

  return 0;

}