What are the different classes of operators we learned so far? What are relational operator used for? In C$++,$ the operator $=$ is used to test for equality. T or F The output of a mathematical expression is a number while the output of a relational expression is a boolean $($true or false$).$ T or F In C$++,$ any zero value is false while any other value is true. T or F$?$ The if statement allows a block of code to be conditionally executed or skipped over. T or F