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Leviafan [203]
3 years ago
9

What must be done before using ArrayLists? (This is Java Programming btw)

Computers and Technology
1 answer:
Viktor [21]3 years ago
5 0

Answer:

to create an ArrayList , you declare an Arraylist variable and call the ArrayList constructor to instantiate and ArrayList object and assign it to the variable

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3 years ago
You want to create a directory called ~/Documents/papers, but you’re not sure that the ~/Documents directory exists. What comman
SCORPION-xisa [38]

Answer: e) mkdir -p ~/Documents/papers

Explanation:

As the question says we want to create a directory called ~/Documents/papers, but we are not sure whether it exist or not so we would type the command for making directory starting with mkdir.

Here mkdir means make directory. Followed by mkdir we will use -p. Here p is used to create all the directories for getting us the directory we want and its advantage is that it would ignore all the errors if the directory already exist.

Followed by the name of the directory that we want to create.

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5 0
3 years ago
Write a question that the database will understand. Which records do not contain "sold"?
astraxan [27]

Answer:

b

Explanation:

b

4 0
2 years ago
Write a program that prompts the user to input a number. The program should then output the number and a message saying whether
Gala2k [10]

Answer:

Following is the program in C++ Language

#include <iostream> // header file

using namespace std; // namespace std

int main() // main method

{

   int n;  // variable declaration

   cout<<" Please enter the number :";

   cin>>n; // Read the number

   if(n>0) // check the condition when number is positive

   {

cout<<n<<endl<<"The number is Positive"; // Display number

   }

  else if(n<0) // check the condition when number is Negative

  {

cout<<n<<endl<<"The number is Negative";// Display number

  }

  else // check the condition when number is Zero

  {

cout<<n<<endl<<"The number is Zero";// Display number

  }

   return 0;

  }

Output:

Please enter the number:

64

The number is Positive

Explanation:

Following are the description of the program

  • Declared a variable "n" of int type.
  • Read the value of "n" by user.
  • Check the condition of positive number by using if block statement .If n>0 it print the number is positive.
  • Check the condition of negative number by using else if block statement If n<0 it print the number is negative.
  • Finally if both the above condition is fail it print the message " The number is Zero"

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3 years ago
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