package flag
Float64Var defines a float64 flag with specified name(2nd parameter), default value(3rd parameter), and usage(4th parameter) string. The argument p(1st parameter) points to a float64 variable in which to store the value of the flag.
Golang flag.Float64Var() function usage example
package main
import (
"flag"
"fmt"
)
var boostvalue float64
func init() {
flag.Float64Var(&boostvalue, "throttle", 0.2, "Value to boost current throttle [default :0.2]")
}
func main() {
fmt.Println(flag.Lookup("throttle")) // print Flag struct
fmt.Printf("%.6f\n", boostvalue)
}
Output :
&{throttle Value to boost current throttle [default :0.2] 0.2 0.2}
0.200000
Reference :
http://golang.org/pkg/flag/#Float64Var
