MATLAB Special Variables and Constants Quiz
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MATLAB Special Variables and Constants Quiz

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Questions and Answers

What command should be used to display all 15 digits of a number in MATLAB?

format long

How can you delete variables 'a' and 'b' from the workspace in MATLAB?

clear a b;

What operator is used for array multiplication in MATLAB?

.*

Which operator is used for array right-division in MATLAB?

<p>./</p> Signup and view all the answers

What does the colon ':' operator do in MATLAB?

<p>generates regularly spaced elements and represents an entire row or column</p> Signup and view all the answers

What do parentheses '()' do in MATLAB?

<p>encloses function arguments and array indices; overrides precedence</p> Signup and view all the answers

What is the purpose of the semicolon in MATLAB?

<p>Semicolon separates columns and suppresses display.</p> Signup and view all the answers

What does the special variable 'ans' represent in MATLAB?

<p>The most recent answer.</p> Signup and view all the answers

What does the special variable 'eps' represent in MATLAB?

<p>Accuracy of floating-point precision.</p> Signup and view all the answers

How do you create MATLAB variables?

<p>Simply assign a value (or an expression) to a variable name in the command window.</p> Signup and view all the answers

What does the imaginary unit 'i' represent in MATLAB?

<p>The imaginary unit √-1.</p> Signup and view all the answers

How can you view the contents of a variable in MATLAB?

<p>By typing the variable name at the MATLAB prompt in the Command Window.</p> Signup and view all the answers

What happens when you overwrite a variable in MATLAB?

<p>The variable gets updated with the new assigned value.</p> Signup and view all the answers

What does 'NaN' represent in MATLAB?

<p>NaN represents an undefined numerical result (not a number).</p> Signup and view all the answers

What does 'Pi' represent in MATLAB?

<p>The number π.</p> Signup and view all the answers

How can you enter multiple statements per line in MATLAB?

<p>By separating the statements with a semicolon.</p> Signup and view all the answers

What happens when you encounter an error message in MATLAB?

<p>You will be notified of the error, and you can correct it by retyping the command.</p> Signup and view all the answers

How can you control the hierarchy of operations or precedence in MATLAB?

<p>By using parentheses to specify the order of operations.</p> Signup and view all the answers

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