Variable is a placeholder for a value that behaves as the value it contains.
x = 123
y = "Hello"
z = true
this is how variable looks like. but in java we need to specify the data type when we declare a variable. So for that we need Data Types
How to Declare a Variable?
Transclude of Variables-2024-08-28-03.47.43.excalidraw
Print Variable
public class App {
public static void main (String[] args){
int x = 26987 //initialization
System.out.println(x); //printing variable
System.out.println("My student id is : "+x); //printing variable with string
}
}Swap variables in Java
public class VariableSwap {
public static void main (String[] args){
int a = 10;
int b = 20;
int temp;
System.out.println("Before swapping a = " + a + " b = " + b);
temp = a;
a = b;
b = temp;
System.out.println("After swapping a = " + a + " b = " + b);
}
}