Can you help me with the while loop?

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Tri Dang
Tri Dang 2021-6-16
回答： Anagha Mittal 2021-6-17
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 个评论
Rik
Rik 2021-6-16
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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回答（1 个）

Anagha Mittal
Anagha Mittal 2021-6-17
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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