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Can you help me with the while loop?

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Tri Dang
Tri Dang on 16 Jun 2021
Answered: Anagha Mittal on 17 Jun 2021
I want in min years to make a final value to increase (but not exceeding 3 time the investment)
The code doesn't work
Can someone take a look?
numYears = 0;
while (FinalValue <= 3*Investment)
numYears=numYears+1;
FinalValue=Investment*power(1+Rate,numYears);
end
  1 Comment
Rik
Rik on 16 Jun 2021
Apart from the missing initialization and the lack of formatting, there doesn't seem to be an issue.
What is the specific issue you're having?

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Answers (1)

Anagha Mittal
Anagha Mittal on 17 Jun 2021
Missing initialization seems to be the issue. You need to initialize 'FinalValue' as 0 to remove the error as well as 'Rate' and 'Investment' to the suitable value.
Rate = 5; % use your desired value
Investment = 1000; % use your desired value
numYears = 0;
FinalValue = 0;
while (FinalValue <= 3*Investment)
numYears = numYears+1;
FinalValue = Investment*power(1+Rate, numYears);
end
% disp(FinalValue);
disp(numYears);
This code works but it displays the FinalValue to be greater than 3*Investment as anyhow the loop will run once, since initially the condition FinalValue <= 3*Investment is true. To achieve this condition, you may use an if statement within the loop to calculate previous year when your desired condition held.
Rate = 2; % use your desired value
Investment = 1000; % use your desired value
numYears = 0;
FinalValue = 0;
while (FinalValue <= 3*Investment)
numYears=numYears+1;
FinalValue=Investment*power(1+Rate,numYears);
if FinalValue > 3*Investment
numYears = numYears - 1;
break
end
end
% disp(FinalValue);
disp(numYears);

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