Operators and Programming Constructs pot

Operators and

Programming

Constructs

Chapter 3

Operators are used to compute results and compare

the data values of a program. A program often

involves

decision-making and iterative tasks. To accomplish

these tasks, programmers use various operators in

the conditional and looping constructs.

This chapter discusses the types of operators used in

C# language. In addition, the conditional constructs

and the looping constructs are also discussed.

In this chapter, you will learn to:

 Use various operators:

z Arithmetic

z Arithmetic assignment

z Unary

z Comparison

z Logical

 Use conditional constructs

 Use looping constructs

Objectives

¤NIIT Operators and Programming Constructs 3.3

Applications use operators to process the data entered by a user. Operators like + and - are

used to process variables and return a value. An operator is a set of one or more characters

that is used for computations or comparisons. Operators can transform one or more data

values, called operands, into a new data value.

Consider the following expression:

X+Y

The preceding expression uses two operands and an operator to add the values stored in

the variables.

Operators in C# can be classified as follows:

„ Arithmetic operators

„ Arithmetic assignment operators

„ Unary operators

„ Comparison operators

„ Logical operators

These operators are the symbols that are used to perform arithmetic operations on

variables. The following table describes the commonly used arithmetic operators.

Operator Description Example

+ Used to add two

numbers

X=Y+Z;

If Y is equal to 20 and Z is equal to 2, X will

have the value 22.

- Used to subtract two

numbers

X=Y-Z;

If Y is equal to 20 and Z is equal to 2, X will

have the value 18.

* Used to multiply two

numbers

X=Y*Z;

If Y is equal to 20 and Z is equal to 2, X will

have the value 40.

Using Operators

Arithmetic Operators