Question

write a while loop that reads integers from input and calculates integer finalnum as follows: if the input is divisible by 5, add the input divided by 5 to finalnum. otherwise, subtract the input multiplied by 5 from finalnum. the loop iterates until a negative integer is read. ex: if the input is 15 11 5 -3, then the output is: final number is -31 note: x % 5

Answer 1

The while loop for the program that reads integers from input and calculates integer is illustrated thus:

#include <iostream>

using namespace std;

int main()

{

//declaring the variables

int userInput;

int outputVal;

outputVal = -19;

//take user input

cin >> userInput;

//take user input until negative input is given

while(userInput > 0)

{

 //if the input is divisible by 5, subtract the

 //input divided by 5 from outputVal

 if(userInput%5==0)

     outputVal -= userInput/5;  

 //if the input is not divisible by 5, add the

 //input multiplied by 5 from outputVal

  else

     outputVal += userInput*5;

   cin >> userInput; // take input

}

//print the output value

  cout << "Output value is " << outputVal << endl;

return 0;

What is a while loop?

A while loop is a control flow statement in most computer programming languages that allows code to be performed repeatedly based on a supplied Boolean condition. The while loop is similar to a looping if statement.

A "While" Loop is used to iterate over a certain block of code until a condition is met. If we wish to ask a user for a number between 1 and 10, we don't know how many times the user may enter a larger number, so we keep asking "while the number is not between 1 and 10."

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