1 st Semester Module4-1 Iteration statement - while อภิรักษ์ จันทร์สร้าง Aphirak Jansang Computer Engineering Department Kasetsart University, Bangkok THAILAND

1 st Semester /39 Outline  Review condition statement  Loop statements while statement do…while statement for statement  break statement

1 st Semester /39 Simple C# Structure  Namespace Class  Main()Namespace Class Main() Variable & Constant Location statements WriteLine, ReadLine, if, switch, Loop Review condition statement

1 st Semester /39 Condition Statements condition if (condition) statement; condition if (condition) statement1; else statement2; ( ) switch ( ) { case : ; break; default: ; break; } Review condition statement

1 st Semester /39 Outline  Review condition statement  Loop statements while statement do…while statement for statement  break statement

1 st Semester /39 Loop or Iteration in C# for while do…while foreach Iteration Loop statements

1 st Semester /39 Simple C# Program Start statement1 End statement1 Loop statements

1 st Semester /39 Simple C# Program with Loop Start x=5; statement1 x=x-1; End x>0 true false Loop statements

1 st Semester /39 Outline  Review condition statement  Loop statements while statement do…while statement for statement  break statement

1 st Semester /39 while statement condition statement true false while (condition) statement; while statement

1 st Semester /39 Iteration Template  Counter Controlled  Sentinel Controlled while statement

1 st Semester /39 Example3: Count Controlled  Display 1 – 7 on screen initial counter statement; dec||inc counter condition true false See demo program!!!! prog4-loop.cs while statement: counter controlled

1 st Semester /39 Iteration Template  Counter Controlled  Sentinel Controlled while statement

1 st Semester /39 Example4: Sentinel Controlled  Find summation from user input  Exit program when user input negative number See demo program!!!! prog5-loop.cs while statement: sentinel controlled

1 st Semester /39 Example 5: Display n stars See demo program!!!! prog6-loop.cs while statement: example

1 st Semester /39 Example 6: Display stars See demo!!!! prog7-loop.cs while statement: example

1 st Semester /39 Summary  Loop statements while statement do…while statement for statement  break statement