C Expressions

Overview

In this tutorial, we will learn about C Expressions. An expression is a combination of operands, operators, and function calls that resolves or reduces to a single value.

C Expressions

Expressions can be broadly classified into two categories:

Simple Expressions
Complex Expressions

Simple Expressions

Simple expressions can be categorized into different types. The expression categories are as follows:

Primary
Prefix
Postfix
Unary
Binary
Ternary

Example

In this example, a and b are operands. The * is an operator. The operator is a multiplication operator that calculates the product of two values. The * operator is a binary operator. It requires two operands for the expression.

The result on the right-hand side (RHS) is a variable. The value of the expression is computed and stored in the variable result.

result = a * b;

C Expression

If the operand values are:

a = 3;

b = 5;

In this example, a * b is an expression. When calculated it reduces to the value 15.

Code

/**
**********************************
* Program Description:
* C Expressions Demo
* Filename: expr.c
* C Tutorials - www.TestingDocs.com
*************************************
*/
#include<stdio.h>
int main()
{
 // declare variables
 int a = 3;
 int b = 5;
 int result = 0;

 /* Simple expression */
 result = a * b;

 printf("Result = %d \n",result);
 /* Complex expression */

 return 0;
} // end main

C Expressions