Software DevelopmentSoftware Development Lecture 6: Loop Statements

ObjectivesObjectivesWrite blocks of code that can be

repeatedIdentify how control the amount

of repetitionsIdentify how to exit a repeating

section of codeUse simple string manipulation

code.

Repeating Code (Loops)Repeating Code (Loops)Loop statements allow us to execute

a code multiple timesLike conditional statements, they are

controlled by Boolean expressionsC# has four kinds of loop statements:

◦while

◦do

◦ for

◦ foreach

The while statementThe while statement

Flowchart while CommandFlowchart while Command

Example 1Example 1

Exercise 1: add counterExercise 1: add counter

The do … while statementThe do … while statement

The do … while statementThe do … while statement

Flowchart for do … while Flowchart for do … while CommandCommand

Example 2Example 2

Infinite LoopsInfinite Loops

Example 2:infinite loopExample 2:infinite loop

Breaking out of a while Breaking out of a while StatementStatement

if(a == 12)continue;

Example 2: break infinite Example 2: break infinite looploop

Exercise 2: division and Exercise 2: division and modulesmodules

Problem Analysis (Using Problem Analysis (Using while)while)

Pseudocode for Exercise 2Pseudocode for Exercise 2

Flowchart (Using while)Flowchart (Using while)

Code for Exercise 2: Part 1Code for Exercise 2: Part 1

Code for Exercise 2: Part 2Code for Exercise 2: Part 2

Generating Random Generating Random NumbersNumbers