practice Question java

Basic question 1

//1. Write a Java program to print 'Hello' on screen and your name on a separate line.

public class practice1 {
public static void main(String[] args) {
System.out.println( "rakesh" );
}

}
import java.util.Scanner;
public class practice2 {
//Write a Java program to print the sum of two numbers.
// public static void main(String[] args) {
// int i=5, y=8;
// System.out.println(i+y);

// }
// input methode

public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int a = sc.nextInt();
System.out.print("=");
int b =sc.nextInt();
System.out.print(a+b);
sc.close();
}

}
public class practice3 {
//Write a Java program to divide two numbers and print them on the screen.
// public static void main(String[] args) {
// int a=50, b=3;
// System.out.println(a/b);
// }

// output 16 because here note is use float type and below try to use float type
public static void main(String[] args) {
float a=33,b=10;
System.out.println(a/b);
}
}
// out is 3.3 because i am also use float type date type
// 4. Write a Java program to print the results of the following operations.
// Test Data:
// a. -5 + 8 * 6
// b. (55+9) % 9
// c. 20 + -3*5 / 8
// d. 5 + 15 / 3 * 2 - 8 % 3
import java.util.Scanner;
public class practice4 {
public static void main(String[] args) {
// A. I am try to solve using input methode this question
Scanner sc = new Scanner (System.in);
System.out.println("Enter your input");
int a = sc.nextInt();
int b = sc.nextInt();
int c = sc.nextInt();
System.out.println(a+b*c);
sc.close();
// output is 43
//b.try to solve using declare deta type
int d =(55+9), e=9;
System.out.println(d%e);
//out put 1
//C.
int f = 20, g=-3*5, h=8;
System.out.println(f+g/h);
//out put 19
//d.
int i =5,j=15/3*2, k=8%3;
System.out.println(i+j-k);
//out put is 13

}
}
// //5. Write a Java program that takes two numbers as input and displays the product of two numbers.
// Test Data:
// Input first number: 25
// Input second number: 5
// Expected Output :
// 25 x 5 = 125
import java.util.Scanner;
public class practice5 {
public static void main(String[] args) {
Scanner sc = new Scanner (System.in);
int a = sc.nextInt();
int b= sc.nextInt();
System.out.println(a*b);
sc.close();

}

}
// 6. Write a Java program to print the sum (addition), multiply, subtract, divide and remainder of two numbers.
// Test Data:
// Input first number: 125
// Input second number: 4
// Expected Output :
// 125 + 24 = 149
// 125 - 24 = 101
// 125 x 24 = 3000
// 125 / 24 = 5
// 125 mod 24 = 5
import java.util.Scanner;
public class practice6 {
public static void main(String[] args) {
Scanner sc = new Scanner (System.in);
int a = sc.nextInt();
int b = sc.nextInt();

System.out.println(a + "+" +b + "=" + (a+b));
System.out.println(a + "-" +b + "=" + (a-b));
System.out.println(a + "*" +b + "=" + (a*b));
System.out.println(a + "/" +b + "=" + (a/b));

sc.close();

// input is 125 4
//out put is bellow

// 125+4=129
// 125-4=121
// 125*4=500
// 125/4=31

}

}
// 7. Write a Java program that takes a number as input and prints its multiplication table up to 10.
// Test Data:
// Input a number: 8
// Expected Output :
// 8 x 1 = 8
// 8 x 2 = 16
// 8 x 3 = 24
// ...
// 8 x 10 = 80
import java.util.Scanner;
public class practice7 {
public static void main(String[] args) {
Scanner sc = new Scanner (System.in);
int j = sc.nextInt();

for(int i =1 ; i<=10; i++){
System.out.println(j + "*" + i + "=" + (j*i));
sc.close();
}
}

}
// input is 8
// ouput is below
// 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
// 8*10=80
// Write a Java program to display the following pattern.

// Sample Pattern :

// J a v v a
// J a a v v a a
// J J aaaaa V V aaaaa
// JJ a a V a a

public class practice8 {

public static void main(String[] args) {
// Display the characters to form the text "Java" in a specific pattern
System.out.println(" J a v v a ");
System.out.println(" J a a v v a a");
System.out.println("J J aaaaa V V aaaaa");
System.out.println(" JJ a a V a a");
}
}
//out put bellow

// J a v v a
// J a a v v a a
// J J aaaaa V V aaaaa
// JJ a a V a a
// Write a Java program to compute the specified expressions and print the output.
// Test Data:
// ((25.5 * 3.5 - 3.5 * 3.5) / (40.5 - 4.5))

public class practice9 {
public static void main(String[] args) {
System.out.println((25.5 * 3.5 - 3.5 * 3.5) / (40.5 - 4.5));

}

}
// ouput is 2.138888888888889
// 10. Write a Java program to compute a specified formula.
// Specified Formula :
// 4.0 * (1 - (1.0/3) + (1.0/5) - (1.0/7) + (1.0/9) - (1.0/11))
// Expected Output

public class practice10 {
public static void main(String[] args) {
System.out.println(4.0 * (1 - (1.0/3) + (1.0/5) - (1.0/7) + (1.0/9) - (1.0/11)));

}

}
// output 2.9760461760461765
// Write a Java program to print the area and perimeter of a circle.
// Test Data:
// Radius = 7.5
import java.util.Scanner;
public class practice11 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
float a = sc.nextFloat();
//area is
System.out.println(Math.PI * a*a);
//peremeter is
System.out.println(2* Math.PI*a);

sc.close();

}

}
// output is
// 176.71458676442586
// 47.12388980384689
// Write a Java program that takes three numbers as input to calculate and print the average of the numbers.

import java.util.Scanner;
public class practice12 {
public static void main(String[] args) {
Scanner sc = new Scanner (System.in);
int a = sc.nextInt();
int b = sc.nextInt();
int c = sc.nextInt();
System.out.println(a+b+c/3);
sc.close();

}

}
// input is
// 85
// 55
// 45
// ouput is 155
// 13. Write a Java program to print the area and perimeter of a rectangle.
// Test Data:
// Height = 5.5 width = 8.5
import java.util.Scanner;
public class practice13 {
public static void main(String[] args) {
Scanner sc = new Scanner (System.in);
System.out.print("Enter your height ");
float Height = sc.nextFloat();
System.out.print("Enter your width");
float width = sc.nextFloat();
System.out.print("area is ");
System.out.println(Height*width);
System.out.print("peremiter is ");
System.out.print(2*(Height+width));
sc.close();
}

}

// input is
// Enter your height 5.5
// Enter your width8.5
// out put is
// area is 46.75
// peremiter is 28.0
public class practice14 {
public static void main(String[] args) {
// Display Java version
System.out.println("\nJava Version: " + System.getProperty("java.version"));

// Display Java runtime version
System.out.println("Java Runtime Version: " + System.getProperty("java.runtime.version"));

// Display Java home directory
System.out.println("Java Home: " + System.getProperty("java.home"));

// Display Java vendor name
System.out.println("Java Vendor: " + System.getProperty("java.vendor"));

// Display Java vendor URL
System.out.println("Java Vendor URL: " + System.getProperty("java.vendor.url"));

// Display Java class path
System.out.println("Java Class Path: " + System.getProperty("java.class.path") + "\n");

}
}

// Java Version: 20
// Java Runtime Version: 20+36-2344
// Java Home: C:\Program Files\Java\jdk-20
// Java Vendor: Oracle Corporation
// Java Vendor URL: https://java.oracle.com/
// Java Class Path:
// 15. Write a Java program to swap two variables.
import java.util.Scanner;
public class practice15 {
public static void main(String[] args) {
Scanner sc = new Scanner (System.in);
int a = sc.nextInt();
int b = sc.nextInt();
a = a+b;
b = a-b;
a = a-b;
System.out.println("a is " + a + "b is " +b);

sc.close();

}
}

// input is 10 20
// out put is a is 20b is 10

practice Question java

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