What's the advantage of "If with a short statement"

go, if-statement

Solution

`if v := math.Pow(x, n); v < lim` is interesting if you don't need '`v`' outside of the scope of '`if`'.

It is mentioned in "Effective Go"

Since `if` and `switch` accept an initialization statement, it's common to see one used to set up a local variable.

if err := file.Chmod(0664); err != nil {
    log.Print(err)
    return err
}

The second form allows for '`v`' to be used after the `if` clause.

The true difference is in the scope where you need this variable: defining it within the `if` clause allows to keep the scope where that variable is used to a minimum.

Problem

What's the advantage of using an "If with a short statement" in go lang. ref: go tour ``` if v := math.Pow(x, n); v < lim { return v } ``` Instead of just write the statement before the `if`. ``` v := math.Pow(x, n) if v < lim { return v } ```

Original source