Which of the following is a unary operator in C?

Explanation:

Unary Operators in C

A unary operator takes a single operand and applies the operation to it. For example, the increment operator (++) increases the value of its operand by one, while the decrement operator (--) decreases the value of its operand by one. Unary operators are essential in programming for tasks like loop control, value manipulation, and memory management.

Types of Unary Operators in C:

• Increment Operator (++): Increases the value of its operand by one. It can be used in both prefix (++i) and postfix (i++) forms.
• Decrement Operator (--): Decreases the value of its operand by one. It can also be used in both prefix (--i) and postfix (i--) forms.
• Unary Plus (+): Although it doesn’t change the value of its operand, it indicates that the operand is a positive number. It is rarely used in practice.
• Unary Minus (-): Negates the value of its operand, effectively changing its sign.
• Logical NOT (!): Inverts the truth value of its operand, turning true into false and vice versa.
• Bitwise NOT (~): Inverts each bit of its operand, turning 0s into 1s and 1s into 0s.
• Address-of Operator (&): Returns the memory address of its operand.
• Indirection Operator (*) or Dereference Operator: Accesses the value stored at the memory address pointed to by a pointer variable.
• Size of Operator: Returns the size, in bytes, of its operand.
• Typecast Operator: Converts a variable from one data type to another.