<p>Curious as to why line 14 fails compilation, whereas 15 is ok ?
In the below snippet:</p>
<pre><code> 12 var fl float64
13 thou := 1000
14 fl = 1.2*thou
15 fl = 1.2*1000
</code></pre>
<p>is it that - with variables one can mix wrong types.. with constants it is not that common.</p>
<hr/>**评论：**<br/><br/>Femaref: <pre><p><code>thou</code> will be an int and needs to be converted to a float so you can multiply it. With constants it doesn't matter, as the correct type is chosen automatically.</p></pre>TheMerovius: <pre><p>See <a href="https://golang.org/ref/spec#Constants" rel="nofollow">here</a> for the relevant part of the spec and <a href="https://blog.golang.org/constants" rel="nofollow">here</a> for an in-depth explanation.</p></pre>nagai: <pre><p>Is there any actual reason the compiler can't infer float here?</p></pre>earthboundkid: <pre><p>Go doesn’t have implicit conversion of things with types because in C this has been an endless source of bugs. Fortunately, literals and constants don’t have to have types, so it’s not a problem in practice. Change to <code>const thou = 1000</code> and it will work. </p></pre>
