How to picture "for" loop in block representation of algorithm

Question

I have probem / strange question, i got algorithm with few "for" loops and now i need to do block scheme of this algorithm.

I know how to picture "while" loop, but is this acceptable to represent "for" loop using "while" and at this point make difference between souce code and algorithm?. Ofcourse assuming that all "for" loops are right in place and using loop of any other kind would produce unnecessary code which i avoided using "for" loops.

I'm guessing that this is rather impossible (at least I can't imagine this) to simply picture "for" loop, but maybe there is a way (if exists).

Thanks in advance

Answer 1

Here's a flow chart that illustrates a for loop:

The equivalent C code would be

for(i = 2; i <= 6; i = i + 2) {     printf("%d\t", i + 1); } 

I found this and several other examples on one of Tenouk's C Laboratory practice worksheets.

Answer 2

What's a "block scheme"?

If I were drawing it, I might draw a box with "for each x in y" written in it.

If you're drawing a flowchart, there's always a loop with a decision box.

Nassi-Schneiderman diagrams have a loop construct you could use.