Please help me with this! 1. Write a complete Java program that prompts the user
ID: 3786798 • Letter: P
Question
Please help me with this!
1. Write a complete Java program that prompts the user to enter a nonnegative real number and displays the square root of the number if it is nonnegative or it displays a message that a square root of a negative number is not a real number.
2. Find numbers divisible by 5 and 6. Write a complete Java program that displays all the numbers from 100 to 1,000, ten per line, that are divisible by 5 and 6. Numbers are separated by exactly two spaces
4. Write a complete Java program that prompts the user to enter a positive integer n in order to display n random integers in the range [-10, 20], inclusive. The program should display how many of the integers are negative, the theoretical and experimental probability of a random number in the given range, and it should allow the user to repeat execution of the program.
Explanation / Answer
import java.util.*;
public class decimal {
public static void main(String[] args) {
System.out.println(" Enter a nonnegative real number");
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
if(n<0)
{
System.out.println(" Number is not real number");
}
else
{
System.out.println("Square root of "+n+" is "+Math.sqrt(n));
}
}
}
==================================
Output:
akshay@akshay-Inspiron-3537:~$ javac decimal.java
akshay@akshay-Inspiron-3537:~$ java decimal
Enter a nonnegative real number
16
Square root of 16 is 4.0
akshay@akshay-Inspiron-3537:~$ java decimal
Enter a nonnegative real number
-6
Number is not real number
==============================================
import java.util.*;
public class decimal {
public static void main(String[] args) {
System.out.println("Numbers divisible by 5 and 6");
int l=0;
for (int i=100;i<=1000;i++ )
{
if(i%5==0 && i%6==0)
{
System.out.print(i+" ");
l++;
}
if(l==10)
{
l=0;
System.out.print(" ");
}
}
}
}
==========================================================
akshay@akshay-Inspiron-3537:~$ java decimal
Numbers divisible by 5 and 6
120 150 180 210 240 270 300 330 360 390
420 450 480 510 540 570 600 630 660 690
720 750 780 810 840 870 900 930 960 990
================================================================
import java.util.*;
public class decimal {
public static void main(String[] args) {
int max=20;
int min=(-10);
System.out.println("Enter n");
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
Random rn = new Random();
int c=0;
for (int i=0;i<n ;i++ )
{
int num=rn.nextInt(max - min + 1) + min;
System.out.println(num);
if(num<0)
c++;
}
System.out.println("There are "+c+" negative numbers");
}
}
====================================================
Output:
akshay@akshay-Inspiron-3537:~$ javac decimal.java
akshay@akshay-Inspiron-3537:~$ java decimal
Enter n
5
10
-8
4
-8
-5
There are 3 negative numbers
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