While looking through some example C code, I came across this: <pre class="prettyprint"><code>y -= m < 3; </code></pre> What does this do? It it some kind of condensed for loop or something? It's impossible to google for as far as I know.

<code>m < 3</code> is either <code>1</code> or <code>0</code>, depending on the truth value. So <code>y=y-1</code> when <code>m<3</code> is <code>true</code>, or <code>y=y-0</code> when <code>m>=3</code>

What does y -= m < 3 mean?

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c

While looking through some example C code, I came across this:

y -= m < 3;

What does this do? It it some kind of condensed for loop or something? It's impossible to google for as far as I know.

720

asked Oct 22 '11 23:10

TheTedinator

1 Answers

m < 3 is either 1 or 0, depending on the truth value.

So y=y-1 when m<3 is true, or y=y-0 when m>=3

188

answered Sep 30 '22 06:09

Wei Shi

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