Table of Contents

• func FormatFloat

func FormatFloat reference

func FormatFloat(f float64, fmt byte, prec, bitSize int) string

fmt

one of "beEfgG'

prec

precision, -1 is special for smallest number.

bitSize

32 or 64

v := 3.1415926535

fmt.Println(strconv.FormatFloat(v, 'E', -1, 32))
fmt.Println(strconv.FormatFloat(v, 'E', -1, 64))
fmt.Println(strconv.FormatFloat(1./3, 'f', 9, 64))
fmt.Println(strconv.FormatFloat(4./5, 'f', 9, 64))

3.1415927E+00
3.1415926535E+00
0.333333333
0.800000000