https://leetcode.com/problems/angle-between-hands-of-a-clock/

angle-between-hands-of-a-clock.go

func angleClock(hour int, minutes int) float64 {
    left, right := hourAngle(hour, minutes), minuteAngle(minutes)
    
    if left < right {
        right, left = left, right
    }
    
    return min(left - right, 360 - left + right)
}

func hourAngle(hour int, minutes int) float64 {
    angle := float64((hour % 12) * 30)

    return angle + (float64(minutes) / 60) * 30
}

func minuteAngle(minutes int) float64 {
    return (float64(minutes) / 60) * 360
}

func min(a, b float64) float64 {
    if a < b {
        return a
    }
    
    return b
}