Write an if statement inside of a while loop to check for a positive, negative, or zero number entered by the user. Stop if the user enters zero.

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Mark Dillon
Mark Dillon 2015-7-14
回答： bio lim 2015-7-14
• Start with an if statement: Write a script that first asks the user for a number (using the input command). Then, using an if statement, print out if this number is positive, negative or zero. Test your script a few times to make sure it does the right thing for all three cases.
• Now move your if statement and put it in a for loop that asks the user for input 10 times so you don’t have to keep calling the script by hand. Remember that control-c in the command window will stop the loop.
• Now change the for loop to a while loop that stops when the user inputs zero. What should your stopping condition be?

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回答（1 个）

bio lim
bio lim 2015-7-14
1.
prompt = 'Insert a number: ';
x = input(prompt);
if x < 0
fprintf('Your input is negative number %f.\n', x);
end
if x >= 0
fprintf('Your input is positive number %f.\n', x);
if x == 0
fprintf('The number you inserted is zero.\n')
end
end
2. The user can input multiple values using [], such as [3 5 6 7].
3. I don't understand why you want to make your code more complicated.

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