Page 64 - Trackpad_ipro 4.1_Class8
P. 64
WRITING SOME MORE PROGRAMS
Let us write programs using Java's various concepts.
Program 1: Program to calculate area and perimeter of a rectangle.
public class Calculate {
public static void main(String args[]) {
int length, width, area, perimeter;
length = 5;
width = 10;
// Area of rectangle = length * width
area = length * width;
// Perimeter of rectangle = 2 * (length + width)
perimeter = 2 * (length + width);
System.out.println("Area of the rectangle is: " + area);
System.out.println("Perimeter of the rectangle is: " +
perimeter);
}
}
Program 2: Program to find the amount to be paid.
public class Amount {
public static void main(String args[]) {
int unitPrice, units, amount;
unitPrice = 20;
units = 100;
amount = unitPrice * units;
System.out.println("Total amount to be paid: " + amount);
}
}
TAKING VALUES AS ARGUMENTS
Until now, we have initialised the variables before using them. Java also allows us to take values
of variables from the user at runtime. We can do this by passing arguments into the main()
method.
62 iPro (Ver. 4.1)-VIII

