[Java] 7. 반복문_1.For문 기본

package ex03;

public class For01 {
    public static void main(String[] args) {

        // 108 ~ 102
        // 108 - 102 + 1 = 7

        // 0,1,2,3,4 (5-4+1)
        for (int i = 0; i < 5; i = i++) {
            System.out.println("i의 값은: " + i);
            i++;
        }

        // 4,3,2,1,0
        for (int i = 4; i >= 0; i--) {
            System.out.println("i의 값은: " + i);
        }

C:\workspace\tools\jdk-21\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\lib\idea_rt.jar=53149:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\workspace\java_lec\study\out\production\study ex03.For01
i의 값은: 0
i의 값은: 1
i의 값은: 2
i의 값은: 3
i의 값은: 4
i의 값은: 4
i의 값은: 3
i의 값은: 2
i의 값은: 1
i의 값은: 0

Process finished with exit code 0

구구단

package ex03;

public class Gugudan01 {
    public static void main(String[] args) {


        for (int i = 2; i < 10; i++) {
            for (int b = 1; b < 10; b++) {
                System.out.println(i + "*" + b + "=" + (i * b));
            }
            System.out.println();

        }

C:\workspace\tools\jdk-21\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\lib\idea_rt.jar=53157:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\workspace\java_lec\study\out\production\study ex03.Gugudan01
2*1=2
2*2=4
2*3=6
2*4=8
2*5=10
2*6=12
2*7=14
2*8=16
2*9=18

3*1=3
3*2=6
3*3=9
3*4=12
3*5=15
3*6=18
3*7=21
3*8=24
3*9=27

4*1=4
4*2=8
4*3=12
4*4=16
4*5=20
4*6=24
4*7=28
4*8=32
4*9=36

5*1=5
5*2=10
5*3=15
5*4=20
5*5=25
5*6=30
5*7=35
5*8=40
5*9=45

6*1=6
6*2=12
6*3=18
6*4=24
6*5=30
6*6=36
6*7=42
6*8=48
6*9=54

7*1=7
7*2=14
7*3=21
7*4=28
7*5=35
7*6=42
7*7=49
7*8=56
7*9=63

8*1=8
8*2=16
8*3=24
8*4=32
8*5=40
8*6=48
8*7=56
8*8=64
8*9=72

9*1=9
9*2=18
9*3=27
9*4=36
9*5=45
9*6=54
9*7=63
9*8=72
9*9=81


Process finished with exit code 0