For loop Increment with a step not working
<p>The following Go program fails  to compile </p>

<pre><code>package main

import (
"fmt"
)

func main() {
var celcius int
for i := 0; i &lt;= 300; i + 20 {
    celcius = 5 * (i - 32) / 9
    fmt.Printf("%d \t %d\t \n", i, celcius)
}
}
</code></pre>

<p>The Error message is "i + 20 evaluated but not used" .  How to give a step increment in golang for loop</p>