CHANGE CASE

• Problem Description

  
  program to convert upper case to lower case and lower case to upper case

• CODING ARENA

• #include <stdio.h>

  #include<string.h>

  int main()

  { 

    char str[20];

    int i;

    scanf("%s",str);

    for(i=0;i<strlen(str);i++)

    {

      if(str[i]>=65&&str[i]<=90)

      {

        str[i]=str[i]+32;

      }

      else if(str[i]>=97&&str[i]<=122)

      {

        str[i]=str[i]-32;

      }

    }

    printf("%s",str);

    return 0;

  }

    

• Test Case 1

  
  Input (stdin)

  hai
  
  

  Expected Output

  HAI

• Test Case 2

  
  Input (stdin)

  HAI
  
  

  Expected Output

  hai