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qi bing

on 21 March 2013

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Transcript of vb03--loop

loop structure 1. What is loop structure Tell us about loop structure in
your daily live.

drinking water from a cup... Let's analyze the loop structure 1. flag of beginning
2.expression of judgement if the loop structure can be run
3.action line(s)
4.flag of end Do while <expression>
code line(s)
loop example 1:
0.5mm paper
? >8848000 example 2:
The age of Diophantus example 2: input the students
score; output sum; when input
-1, then end the program. Another kind of loop structure for var=start num to end num
code line(s)
next var example 1:
Sum 1 to 100 if Multi 1 to 100? example 3: narcissus number About nesting loop: Example 4: multi from 1*1 to 9*9 Example 5: narcissus number another kinds of loop while <expression>
code line(s)
wend do
code line(s)
loop while <expression> "while" can be changed with "until" Summary 1. types of loop structure
2.process of running
3.how to judge a loop structure?
4.about nesting loop
Full transcript