A Tour of Go If with a short statement
Like for
, the if
statement can start with a short statement to execute before the condition.
Variables declared by the statement are only in scope until the end of the if
.
(Try using v
in the last return
statement.)
package main import ( "fmt" "math" ) func pow(x, n , lim float64) float64 { if v := math.Pow(x,n); v < lim { return v } return lim } func main() { fmt.Println( pow(3, 2, 10), pow(3, 3, 20), ) }