main.go

package main

import (
	"fmt"
	"math"
)

func getNamedStockPriceChange(prevPrice, currentPrice float64) (change, percentChange float64) {
	change = currentPrice - prevPrice
	percentChange = (change / prevPrice) * 100
	return
}

func main() {
	prevStockPrice := 100000.0
	currentStockPrice := 90000.0

	change, percentChange := getNamedStockPriceChange(prevStockPrice, currentStockPrice)

	if change < 0 {
		fmt.Printf("The Stock Price decreased by $%.2f which is %.2f%% of the prev price\n", math.Abs(change), math.Abs(percentChange))
	} else {
		fmt.Printf("The Stock Price increased by $%.2f which is %.2f%% of the prev price\n", change, percentChange)
	}
}