Java Math Class Java Random Number Class

1. JAVA
"WRITE ONCE, RUN ANYWHERE”
Lec--5
By: Zubair Khalid

2. Java
£ Java Math Class
£ Java Random Number Class

3. Java math class contains the following useful methods
Java Math Class
£ Power
£ Absolute
£ Ceil
£ Floor
£ Maximum
£ Minimum
£ Square root

4. Power
This method is used for calculating power of a number
Math.pow (a, b);
Number
Desired power of that
number

5. Power (Example)
Import java.Util.Scanner;
Class c1{
Public static void main(string[] args) {
system.Out.Println("please enter A number");
Scanner input=new scanner(system.In);
Int number,power;
Number=input.Nextint();
System.Out.Println("please enter power");
Power=input.Nextint();
System.Out.Println("power of "+number+" is "+math.Pow(number, power));
}
}

6. Absolute
£ it shows the absolute value of a number.
£ If we enter -ve or +ve value it will show us absolute value.
Math.abs (a);
Number

7. Absolute (Example)
Import java.Util.*;
Class c2{
Public static void main(string[] args) {
int number;
Scanner scan=new scanner(system.In);
System.Out.Println("please enter A number:");
Number=scan.Nextint();
System.Out.Println(math.Abs(number));
}
}

8. Ceil
It rounds up the number like if we enter (7.1-7.9) the output always will be 8.0.
Math.ceil (a);
Number

9. Ceil (Example)
Import java.Util.Scanner;
Class c3{
Public static void main(string[] args) {
double number;
Scanner scan=new scanner(system.In);
System.Out.Println("please enter A number:");
Number=scan.Nextdouble();
System.Out.Println(math.Ceil(number));
Scan.Close();
}
}

10. Floor
it rounds down the number like if we enter (7.1-7.9) the output always will be 7.0.
Math.floor (a);
Number

11. Floor (Example)
import java.util.Scanner;
class c4{
public static void main(String[] args) {
double number;
Scanner scan=new Scanner(System.in);
System.out.println("Please Enter A Number:");
number=scan.nextDouble();
System.out.println(Math.floor(number));
scan.close();
}
}

12. Maximum
it takes two numbers and output the variable which is maximum.
Math.max (a, b);
Number

13. Maximum (Example)
import java.util.Scanner;
class c5{
public static void main(String[] args) {
double number;
Scanner scan=new Scanner(System.in);
System.out.println("Please Enter A Number:");
number=scan.nextDouble();
System.out.println(Math.max(1.2,5.2));
scan.close();
}
}

14. Minimum
it takes two numbers and output the variable which is minimum.
Math.min (a, b);
Number

15. Minimum (Example)
import java.util.Scanner;
class c6{
public static void main(String[] args) {
double number;
Scanner scan=new Scanner(System.in);
System.out.println("Please Enter A Number:");
number=scan.nextDouble();
System.out.println(Math.min(1.2,5.2));
scan.close();
}
}

16. Square root
it takes a number as input and output the square root of that number.
Math.sqrt (a);
Number

17. Square root (Example)
import java.util.Scanner;
class c7{
public static void main(String[] args) {
double number;
Scanner scan=new Scanner(System.in);
System.out.println("Please Enter A Number:");
number=scan.nextDouble();
System.out.println(Math.sqrt(number));
scan.close();
}
}

18. import java.util.Random;
class c8{
public static void main(String[] args) {
Random dice=new Random();
int number;
for(int counter=1;counter<=10;counter++)
{
number=dice.nextInt(6);
System.out.println(number+"");
}
}
}
Java Random Number Class
Example: