Computer Programming 1
Essential Standard 5.05 Apply Looping Structures


Anatomy of a Looping Structure

Syntax of Do...Loop While 			Syntax of For…Next Loop

 Do 						For intVariable = intStart To intEnd  Step intAmt
	Statements 					Statements
 Loop While(Boolean Condition) 		Next intVariable

						**Step is optional
Syntax of Do While...Loop

 Do While(Boolean Condition)
	Statements
 Loop


Practice the Decision Structure

Write the appropriate loop for each expression.

1.	Write a For…Next loop that will start at 0 and end at 10 counting by 2.
For 0 To 10 Step 2
Next
2.	Write a For…Next loop that will start count backwards from 10 to 1.
For 10 to 1 Step -1
Next
3.	Write a Do While loop that will loop until the user enters -1.
Do While intInputbox <> -1
Loop
4.	Write a Do...Loop While that will loop until the user enters “Stop”.
Do While strInputbox <> “Stop”
Loop
5.	Write a Do While loop that will loop until the intNum is 10 when intNum starts at 1.
intNum = 1
Do While intNum < 10
intNum = intNum + 1
Loop
6.	Write a Do. Loop While loop that will loop until the intNum is 10 when intNum starts at 1.
intNum = 1
Do
intNum = intNum + 1
       Loop While intNum < 10
Find the Errors & Rewrite

Find the syntax or logic error. Rewrite the code correctly.

7.	intNum = 0
Do While (intNum < 10)
   intNum +=1
Loop

8.	For intNum As Integer = 10 to 0 Step -1
Next intNum

9.	intNum = 1
Do While (intNum < 10)
   intNum +=1
Loop