40 lines
706 B
Go
40 lines
706 B
Go
package format
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import (
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"log"
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"strconv"
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"strings"
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)
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// 数字变成带千分位的字符串
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func NumToStringWithThousandthPercentile(numberStr string) string {
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if _, err := strconv.ParseFloat(numberStr, 64); err != nil {
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log.Fatalln("is not a number")
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return ""
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}
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sliceList := strings.Split(numberStr, ".")
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s := sliceList[0]
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f := ""
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if len(sliceList) == 2 {
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f = "." + sliceList[1]
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}
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l := len(s)
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if l <= 3 {
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return s + f
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}
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r := l % 3 //前面第几位开始加入千分位
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if r == 0 {
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r = 3
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}
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b := strings.Builder{}
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for i := 0; i < l; i++ {
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b.WriteString(string(s[i]))
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if i+1 == r && i != l-1 {
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b.WriteString(",")
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r += 3
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}
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}
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b.WriteString(f)
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return b.String()
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}
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