Question

How to get the first digit after the decimal point of a float number in Go

Answer 1

package main

import (
    "fmt"
    "math"
)

func firstDecimalDigit(f float64) int {
    return int(math.Floor(math.Abs(f) * 10)) % 10
}

func main() {
    f := 983.6571
    fmt.Println(firstDecimalDigit(f)) // 6
}


/*
run:

6

*/

 

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