Program to cheque enter character is upper case or lower case and convert upper case into lower and lower into upper case in c-language

-
#include<stdio.h>
int main()
{
    char ch;
    printf("Enter the character\n");
    scanf("%c",&ch);
    if(ch>=65&&ch<=90)
    {
        printf("Upper case\n");
        ch=ch+32;
        printf("Lower case is %c",ch);
    }
  else if(ch>=97&&ch<=122)
    {
        printf("lower case \n");
        ch=ch-32;
        printf("Upper case is %c",ch);
    }
    }

OUTPUT
Enter the character
A
Upper case
Lower case is a

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