Increment and Decrement Operators in C

Increment and decrement operators in C are unary operators used to increase or decrease the value of a variable by one.

Increment Operator (++)

The increment operator increases the value of a variable by 1.

Example: a++;

Decrement Operator (--)

The decrement operator decreases the value of a variable by 1.

Example: a--;

Pre-Increment Operator (++a)

In pre-increment, the variable is incremented first and then its updated value is used in the expression.

Example: ++a;

Post-Increment Operator (a++)

In post-increment, the current value is used first and then the variable is incremented.

Example: a++;

Pre-Decrement Operator (--a)

In pre-decrement, the variable is decremented first and then its updated value is used.

Example: --a;

Post-Decrement Operator (a--)

In post-decrement, the current value is used first and then the variable is decremented.

Example: a--;

Key Points to Remember

• These operators work only with variables, not constants
• They change the value of the variable by exactly one
• Pre and post forms behave differently in expressions
• Avoid using multiple increment/decrement operators in a single expression