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Question and Answer. From Anna University past year exam papers for Programming in C – CS 3251.

Types of Operators in C

Anna University Exam Question

Q.2. (2 Marks) (Nov/Dec 2022) Unit 1.

What are various types of operators in C?

Answer

• Arithmetic operators (+, -, *, /, %)
• Relational operators (also known as comparison operators) (==, !=, <, >, <=, >=)
• Logical operators (&&, ||, !)
• Assignment operators (=, +=, -=, etc.)
• Increment and decrement operators (++, --)
• Conditional operator (also known as ternary operator) (?:)
• Bitwise operators (&, |, etc.)
• Special operators (sizeof, address operator &, dereference operator *, etc.)

Note: Since this is just a 2-mark question, all this information may not be necessary to write. We may write as much as we remember.

Supplementary Notes

1. Arithmetic Operators

Arithmetic operators are used for mathematical calculations.

Example

int a = 10, b = 3;
a + b is 13
a - b is 7
a * b is 30
a / b is 3
a % b is 1

2. Logical Operators

Note

C does not have a built-in boolean data type.

• True is represented by 1
• False is represented by 0
• In general, any non-zero value is treated as true.

3. Relational (Comparison) Operators

Relational operators are used to compare two values. The result is either true (1) or false (0).

Note

C does not have boolean (true/false) data type.

• 1 (or any non-zero value) represents true.
• 0 represents false.

Relational operators are commonly used in decision-making and looping statements.

4. Assignment Operators

Assignment operators are used to assign values to variables.

5. Increment and Decrement Operators

Increment and decrement operators are used to increase or decrease the value of a variable by 1.

Example

int a = 5, b = 10;
a++;   // a is now 6
b--;   // b is now 9

6. Conditional (Ternary) Operator

The conditional (ternary) operator is used to evaluate a condition and return one value if true and another value if false.

Syntax

condition ? expression1 : expression2

Example

int a = 10, b = 20, max;max = (a > b) ? a : b;

Since a > b is false, max will be 20.

Note

The ternary operator takes 3 operands.

• Unary operator takes one operand.
• Binary operator takes two operands.
• Similarly, ternary operator works with three operands.

7. Bitwise Operators

Bitwise operators perform operations on individual bits.

8. Special Operators

Special operators are used for various special purposes.