while loop with a boolean expression

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mazari ahmed
mazari ahmed 2015-3-20
回答： mazari ahmed 2015-4-9
why my boolean expression is not working , is there any syntax error. here is my code :
v=false;
while ((i < N)&&(v==false)) if (condition) v=true; i=i+1; else i=i+1; end end

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采纳的回答

Image Analyst
Image Analyst 2015-3-20
Don't even use v. Just break:
while (i < N)
if (condition)
break;
end
i=i+1;
end

更多回答（2 个）

Stephen23
Stephen23 2015-3-20
编辑：Stephen23 2015-3-20
A few tips:
  • v==false is rather awkward code, as the while operation requires a logical value: v is already a logical value, so instead of doing this round-about numeric comparison, why not just use the simplest form of ~v instead?
  • Do not use i or j as loop variables names, as these are the names of the inbuilt imaginary unit.
  • Using the else statement and repeating the code that increments the loop variable could be replaced by simply incrementing the variable once after the if statement.
  • the if statement does nothing useful: why not just define v directly using condition?
Altogether we get this:
v = false;
while k<N && ~v
v = ~condition;
k = k+1;
end
which we can then simplify be noting that everywhere ~v is used can simply be condition instead:
condition = true;
while k<N && condition
k = k+1;
end
mazari ahmed
mazari ahmed 2015-4-9
problem solved

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