About Conditional Statements

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About Conditional Statements

A loop is a programming structure that allows you to run a set of code multiple times. In contrast, a conditional statement is a line of code that check for a condition, and then runs a set of code if the conditional statement is true. You use conditional statements and loops together to run code based on conditional values. For example, you could use a conditional statement to run different sections of code, depending on what the date was. Or perhaps you want to know whether the data you are processing contains  a certain text phrase. You would use a conditional statement for either of those checks.

The basic conditional statement is the if-statement, which has the following syntax:

if (some conditional statement holds true) 

{

 PerformSomeTask(); 

 PerformSomeOtherTask();

Note that a conditional statement uses the same opening and closing brackets as a function. The code you place in between the brackets will only be executed if the conditional statement holds true. This is a very important point: if the statement doesn’t hold true then the section of code encapsulated between brackets is completely skipped.

The following topics discuss conditional statements and loops.

Topics

Description

Conditional Operators

About basic conditional operators, such as greater-than and less-than.

Else Statements

How to put together a branching if-then-else statement.

Compound If-Statements

How to link multiple if-statements together.

Switch Statement

How to use a switch statement.

Loops

How to loop code.