package flag
Float64 defines a float64 flag with specified name(1st parameter), default value (2nd parameter), and usage string(3rd parameter). The return value is the address of a float64 variable that stores the value of the flag.
Golang flag.Flag64() function usage example
package main
import (
"flag"
"fmt"
)
var throttle = flag.Float64("throttle", 0.75, "throttle value; 0.0 = no time allocated, 1.0 = full throttle [default : 0.75]")
func main() {
fmt.Println(flag.Lookup("throttle")) // print Flag struct
fmt.Printf("Throttle value : %.6f\n ", *throttle)
}
Output :
&{throttle throttle value; 0.0 = no time allocated, 1.0 = full throttle [default : 0.75] 0.75 0.75}
Throttle value : 0.750000
Reference :
http://golang.org/pkg/flag/#Float64
