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barxatty [35]
3 years ago
5

What is the symbol that causes the computer to perform string concatenation?

Computers and Technology
1 answer:
neonofarm [45]3 years ago
4 0

Answer: In java the symbol "+" operator is used to perform string concatenation.

Explanation:

String concatenation refers to joining of two strings. So in java + is used to join strings which works provided one of the operands must be a String variable. Then it works by converting the other variable to String variable and joins the second operand to the end of the first operand.

An example of String concatenation is as follows:

int age = 10;

System.out.println("The boys age is " + age);

Output:

The boys age is 10.

here, the age is integer variable but as the phrase "The boys age is" is a String variable so it converts the age to String variable and joins both the Strings.

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Write a program that deliberately contains an endless or infinite while loop. The loop should generate multiplication questions
Westkost [7]

Answer:

The Java code is given below with appropriate variable names for better understanding

Explanation:

import java.util.Random;

import java.util.Scanner;

public class MultiplicationQuestions {

   public static void main(String[] args) {

       Scanner scan = new Scanner(System.in);

       Random rand = new Random();

       int n1, n2, result, total = 0, correct = 0;

       char ch = 'y';

       while(ch == 'y'){

           n1 = 1 + rand.nextInt(9);

           n2 = 1 + rand.nextInt(9);

           System.out.print("What is "+n1+" * "+n2+" ? ");

           result = scan.nextInt();

           if(result==n1*n2){

               System.out.println("Correct. Nice work!");

               correct++;

           }

           else{

               System.out.println("Incorrect. The product is "+(n1*n2));

           }

           System.out.print("Want more questions y or n ? ");

           ch = scan.next().charAt(0);

           total++;

       }

       System.out.println("You scored "+correct+" out of "+total);

   }

}

3 0
3 years ago
Write a java program that would request user name, id number, and state the time the user has reported at work.​
Troyanec [42]

Answer:

import java.text.DateFormat;

import java.text.SimpleDateFormat;

import java.time.LocalDateTime;

import java.time.format.DateTimeFormatter;

import java.util.Date;

import java.util.Scanner;  

public class Main {

   private static final DateFormat dateformat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");

   private static final DateTimeFormatter datetimeformat = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");

   public static void main(String[] args) {

       

       System.out.println("Enter your ID and Name");

       LocalDateTime current = LocalDateTime.now();

       Scanner sc1 = new Scanner(System.in);  

       String Name= sc1.nextLine();

       int ID = sc1.nextInt();

       System.out.println(Name + "reported at:");

      System.out.println(datetimeformat.format(current));

   }

}

Explanation:

The above program saves the current date-time as well, at the time when the user enters his name and ID. And it prints the same on the screen. Further, you can store these in a data structure like list or class or you can store it in a database as well. Remember, this is the difference between a program and a web application, and not to forget we have a toolkit in case of the web application. And here we are working on the console. Also, a web application has a front panel and back panel. However, a program only solves a computing problem, and there is no well-designed interface with the user. However, programming is the root of all other programmings like web programming, mobile app programming, etc.

3 0
3 years ago
Clive wants to write a query that will display the names of the students who scored less than 10 in their final exams. Which num
Mice21 [21]
I'd go for <span>FLOOR(x)
</span>

The numerical function FLOOR(x) can be used to return the largest integer value that is less than or equal to the numerical expression provided. The numerical function CEILING (x) is the opposite of FLOOR(x) since it gives the smallest integer value that is greater or equal to the numerical expression.






6 0
3 years ago
Read 2 more answers
Compare Fibonacci (recursion vs. bottom up)
ipn [44]

Answer:

C++ code explained below

Explanation:

#include<bits/stdc++.h>

#include <iostream>

using namespace std;

int FiboNR(int n)

{

int max=n+1;

int F[max];

F[0]=0;F[1]=1;

for(int i=2;i<=n;i++)

{

F[i]=F[i-1]+F[i-2];

}

return (F[n]);

}

int FiboR(int n)

{

if(n==0||n==1)

return n;

else

return (FiboR(n-1)+FiboR(n-2));

}

int main()

{

long long int i,f;

double t1,t2;

int n[]={1,5,10,15,20,25,30,35,40,45,50,55,60,65,70,75};

cout<<"Fibonacci time analysis ( recursive vs. non-recursive "<<endl;

cout<<"Integer FiboR(seconds) FiboNR(seconds) Fibo-value"<<endl;

for(i=0;i<16;i++)

{

clock_t begin = clock();

f=FiboR(n[i]);

clock_t end = clock();

t1=double(end-begin); // elapsed time in milli secons

begin = clock();

f=FiboNR(n[i]);

end = clock();

t2=double(end-begin);

cout<<n[i]<<" "<<t1*1.0/CLOCKS_PER_SEC <<" "<<t2*1.0/CLOCKS_PER_SEC <<" "<<f<<endl; //elapsed time in seconds

}

return 0;

}

7 0
3 years ago
A network administrator needs 10 prevent users from accessing the accounting department records. All users are connected to the
mojhsa [17]

Answer:

C

Explanation:

6 0
3 years ago
Read 2 more answers
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