How to solve the problem of loss of accuracy of floating point numbers in Golang extension package

The following is the go language tutorial column to introduce to you the Golang extension package solution to the problem of floating point precision loss, Hope it helps those in need!

#PS: Today, when I was working on a project for precision processing, I had a precision loss problem. Here I would like to share with you the expansion package solution. Note: This problem may occur, but not necessarily

① Install the expansion pack

go get github.com/shopspring/decimal

② How to use

//首先设置保留位数
decimal.DivisionPrecision = 2  // 四舍五入保留两位小数
// 进行相加number1和number2
sum := decimal.NewFromFloat(number1).Add(decimal.NewFromFloat(number2))
// 返回的类型为decimal.decimal类型，我们在进行转换为float64就好了
newSum, _ := sum.Float64()

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