Question

How to converts character to lowercase in C

Answer 1

#include <stdio.h>
#include <ctype.h> 

int main(void)
{
    int i = 0;
    char str[] = "ABCD";
	
    while( str[i] ) 
    {
      putchar(tolower(str[i]));
      i++;
    }

    return 0;
}

  
/*
  
run:
  
abcd

*/

 

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Answer 2

#include <stdio.h>
#include <ctype.h> 

int main(void)
{
    int i = 0;
    char str[] = "ABCD";
	
    while( str[i] ) 
    {
      str[i] = tolower(str[i]);
      i++;
    }
    puts(str);

    return 0;
}

  
/*
  
run:
  
abcd

*/

 

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