input is a string and well…when input[0] is ‘k’, its apparently the same as ‘f’? like clearly it should be false and not output "f detected" right? k seems to have a value of 107 and f seems to have a value of 102 so even when read as ints, it doesnt seem like it should be possible for them to be equal
>Solution :
Like what @Dúthomhas commented, you have a semicolon after your if statement.
if (input[0] == 'f');
remove it and your code should work.
if (input[0] == 'f')
The semicolon effectively ends the if statement, so the block that follows is always executed, regardless of the condition.