Question and Answer
Q What is the difference between the pre-increment operator and the post-increment operator?
A The pre-increment operator increases the operand's value by 1 first, and then returns the modified value. On the other hand, the post-increment operator stores a copy of the operand value in a temporary location and then increases the operand value by 1. However, the copy of the unmodified operand value is returned in the expression. For instance, given x = 1, the ++x expression returns 2, while the x++ expression returns 1.
Q Is the unary minus operator (-) the same as the subtraction operator (-)?
A No, they are not the same, although the two operators share the same symbol. The unary minus operator is used to change the sign of a value. In other words, the unary minus operator returns the negation of the value. The subtraction operator is an arithmetic operator that performs subtraction between its two operands.
Q Which one has a higher precedence, a relational operator or an arithmetic operator?
A An arithmetic operator has a higher precedence than a relational operator. For instance, the x * y + z > x + y expression is interpreted as ((x * y) + z) > (x + y).
Q What does a relational expression return?
A A relational expression returns either 0 or 1. If the relationship indicated by a relational operator in an expression is true, the expression returns 1; otherwise, the expression returns 0.
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