Why it is necessary to put
else if(ch==‘x’ or ch==‘X’){
return 0;
}
as we have already mentioned in while(ch!=‘X’ or ch!=‘x’)
Why it doesn’t terminate directly when while condition is not true?
Basic Calculator
Hello @AK072672,
It is necessary to mention this condition inside the do-while because the do-while loop will execute the if-else statements at least once. So, if you remove this else if(ch==‘x’ or ch==‘X’) then, control will immediately move to the else part and would print “Invalid operation. Try again”
You can read more about this from the below link,
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