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iOS Swift Collections and Control Flow Control Flow With Conditional Statements If Statement

Posted by Eni Begotaraj
Eni Begotaraj
13,723 Points

If Statements

As it was showed on the video, first we put the if statement, second else statement and then we put the else if between them. So, is it an order on if Statement?

Anatolii Tcai
Anatolii Tcai
2,401 Points
Anatolii Tcai
Anatolii Tcai
2,401 Points

Right. The first one is always if. Then you can add as many else statements as you need. Moreover, it is possible to use only one statement without any else conditions. For example, I want to print a message when satisfying a condition, but if not - I don't need to write anything. In this case you can use only if:

var x = 25

if x > 0 { print("(x) is above 0") }

// Otherwise we just skip this part and continue our code

3 Answers

doesitmatter
doesitmatter
12,885 Points
doesitmatter
doesitmatter
12,885 Points

Yes, you always start with if, then you can put as many else if statements as you want or none at all and optionally end it with an else.

Quinton Gordon
Quinton Gordon
10,985 Points
Quinton Gordon
Quinton Gordon
10,985 Points

Yep just remember that if you have more than one if statement "else" will always be your last statement. That's the standard / best practice. As the video actually showed even the "else" statement is optional. You can actually have an "if" with multiple "else if" and no "else" but doing so is not considered a good practice.

SivaKumar Kataru
SivaKumar Kataru
2,386 Points
SivaKumar Kataru
SivaKumar Kataru
2,386 Points

If - else statements control the flow of the program. If you have one condition to check then if- else statement does it for you.

Lets say, if you have more than one condition to check then we can nest else-if statements followed by the IF. Also keep remember, Order has to be followed while using the else-if statements.

Example: 

    let password  =  "1234"
    var maxLoginAttempts = 3
    if password == "1234" {
        print("Login Success");
    } else if password != "1234" {
       maxLoginAttempts -= 1
       print("Login Failed! No of attempts left: \(maxLoginAttempts)");
    }

In the above example, we haven't used ELSE statement. Its completely optional depends on logic of your program. ```