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29 lines
580 B
29 lines
580 B
6 months ago
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package utils
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import (
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"fmt"
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"math"
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"strconv"
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)
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func FormatFloat(num float64, decimal int) (float64, error) {
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// 默认乘1
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d := float64(1)
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if decimal > 0 {
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// 10的N次方
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d = math.Pow10(decimal)
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}
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// math.trunc作用就是返回浮点数的整数部分
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// 再除回去，小数点后无效的0也就不存在了
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res := strconv.FormatFloat(math.Trunc(num*d)/d, 'f', -1, 64)
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return strconv.ParseFloat(res, 64)
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}
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func FormatFloatToString(num float64) string {
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float, err := FormatFloat(num, 2)
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if err != nil {
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return "-"
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}
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return fmt.Sprintf("%v", float)
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}
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