The unary operators require only one operand; they perform various operations such as incrementing/decrementing a value by one, negating an expression, or inverting the value of a boolean. The increment/decrement operators can be applied before (prefix) or after (postfix) the operand.

What is the use of unary operator in C?

The unary operator is used to change the sign of any positive value to a negative value. It means it changes the positive number to the negative, and a negative number becomes the positive number using the unary minus operator. Example 1: #include <stdio.

What is the point of unary plus?

The unary plus operator ( + ) precedes its operand and evaluates to its operand but attempts to convert it into a number, if it isn't already.