What is a unary operator?
Unary operators are those operators that require a single operand for computations.
Example
- minus
- - increment
++ - decrement
-- - not
~
Minus
The minus operator is used to represent a negative value.
int a = -10 // Here `-` is used to represent a negative value
Increment
Prefix increment
The prefix increment operator precedes the operand and increments the value before using it, e.g., ++temp.
int a = 10;
// it increments `a` by one
// value
// and assigns its value to `b`
int b = ++a;// b = 11
Postfix increment
The postfix increment operator follows the operand and increments the value after using it, e.g., temp++.
int a = 10;
// it assigns the value of `a` to `b`
// and then increments the value of `a` by one
int b = a++;// b = 10
// a = 11
Decrement
Prefix decrement
The prefix decrement operator precedes the operand and decrements the value before using it, e.g., --temp.
int a = 10;
// it decrements `a` by one
// value
// and assigns its value to `b`
int b = --a;// b = 9
Postfix decrement
The postfix decrement operator follows the operand and decrements the value after using it, e.g., temp--.
int a = 10;
// it assigns the value of `a` to `b`
// and then decrements the value of `a` by one
int b = a--;// b = 10
// a = 9
Not
The not operator is a bitwise operator that flips the bits of a value. The bits that are set will be unset and vice versa.
int a = 12; // (00001100)
int b = ~a; // (11110011)
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