JAVA · ОСНОВЫ · LESSON 04

If not.

if, else and comparison · about 15 minutes

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STEP 1

Check the number.

if stands for «если». Write a check in parentheses. If it is correct, the code runs inside the first brackets.

int points = 8;
if (points >= 5) {
    System.out.println("Ура!");
}

✦ Знак >= значит «больше или равно».

STEP 2

There's another way.

else stands for «иначе». Part of it works when the check is false. So the program chooses one of two paths.

int points = 2;
if (points >= 5) {
    System.out.println("Ура!");
} else {
    System.out.println("Ещё раз");
}

Fork.

Verificationpoints >= 5?Yes.first-lineNo.else

✦ With 2 points, it'll come back again.

IN-CLASS PRACTICE

Type the code yourself

Dial both paths of the program. Find a couple of brackets at each branch.

public class Main {
    public static void main(String[] args) {
        int points = 7;
        if (points >= 5) {
            System.out.println("Супер");
        } else {
            System.out.println("Ещё раз");
        }
    }
}

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HOMEWORK

Solve it yourself

Create int score with a value of 8. If score is at least 5, output «Сдано», otherwise «Попробуй ещё». Use if and else.

The answer is hidden. Use similar examples from the lesson notes.

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