No "then" keyword
In C++, the percent symbol % is used as the modulus operator. It calculates the remainder after dividing one integer by another.
In C++, == is the equality operator. It checks whether two values are equal and returns true if they are, and false otherwise.
In C++, bool is a built-in type used to represent Boolean values—essentially, values that are either true or false.
0: false
In C++, != is the inequality operator. It checks whether two values are not equal. If they are different, it returns true; if they’re the same, it returns false.
In C++, && is the logical AND operator, used to combine two Boolean expressions. It returns true only if both expressions are true—otherwise, it returns false.
subtle: not very obvious or easy to notice
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