func main() {
    // Basic one
    if x > 0 {
        return x
    } else {
        return -x
    }
        
    // You can put one statement before the condition
    if a := b + c; a < 42 {
        return a
    } else {
        return a - 42
    }
    
    // Type assertion inside if
    var val interface{}
    val = "foo"
    if str, ok := val.(string); ok {
        fmt.Println(str)
    }
}