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6.5: Logical Functions

  • Page ID
    86203
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    The first step is to create a logical function, which is a function that returns a logical value. The following function takes three input variables, a, b, and c, and returns true (1) if they form a Pythagorean triple and false (0) otherwise.

    function res = is_pythagorean(a, b, c)
        if a^2 + b^2 == c^2
            res = 1;
        else
            res = 0;
        end
    end

    We can use this function like so:

    >> is_pythagorean(3, 4, 5)
    ans = 1

    But we can write the same function more concisely, like this:

    function res = is_pythagorean(a, b, c)
        res = a^2 + b^2 == c^2;
    end

    The result of the equality operator is a logical value, which we can assign directly to res.

    Put this function in a file called is_pythagorean.m, so we can use it as part of our program.


    This page titled 6.5: Logical Functions is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Carey Smith via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.