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Probably simple question about for loops


galvin

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I want to have a for loop that starts at 10 and increases by 10 each time (for 9 loops), rather than increasing just by 1. How do I indicate that I want $i to go up by 10, instead of by 1.  In other words, what do I write instead of "$i++"?

 

for ($i=10; $i<=90; ?????) 

 

 

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