java-core-practice/day-3 code ex at main · Amrutha-space/java-core-practice · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44


#### how variable works

class College {
    static String collegeName = "IIT Delhi";

    int studentId;

    void display() {
        System.out.println(studentId + " " + collegeName);
    }
}

class Demo {
    public static void main(String[] args) {
        College c1 = new College();
        c1.studentId = 101;

        College c2 = new College();
        c2.studentId = 102;

        c1.display();
        c2.display();
    }
}


### how datatypes work!!1


class Demo {
    public static void main(String[] args) {
        int age = 21;
        double marks = 85.5;
        char grade = 'A';
        boolean passed = true;

        System.out.println(age);
        System.out.println(marks);
        System.out.println(grade);
        System.out.println(passed);
    }
}