Go Errors

Go doesn’t throw errors like JavaScript, but it returns them. While writing a function, you should return the value and an error as a second value so that developer can check condition of the returned value.

func sendSMSToCouple(msgToCustomer, msgToSpouse string) (float64, error) {  
	cCost, err := sendSMS(msgToCustomer)  
	if err != nil {  
		return cCost, err  
	}  
  
	sCost, err := sendSMS((msgToSpouse))  
	if err != nil {  
		return sCost, err  
	}  
  
	combinedCost := cCost + sCost  
	return combinedCost, nil  
}  

Go also has errors package that allows you to create an error

func divide(a, b int) (int, error) {  
	if b == 0 {  
		return 0, errors.New("Don't divide by 0!")  
	}  
	return a/b, nil  
}