Further Examples: Select

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This selects the numeric quantities from mm.

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This selects the first .

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This selects the ones that are less than .

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Given a list of real numbers and a list of intervals, the function FindInterval returns a list of pairs. Each pair consists of a number and the interval containing that number. In this definition the intervals are closed on the left and open on the right.

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Here are three numbers.

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Here are two intervals.

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Since is contained in both and , FindInterval returns two pairs for .

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The function allOddDigits gives all positive integers less than x with all odd digits. The in the inner Select terminates the test if an even digit is found.

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This gives the built-in functions that have the option Heads False.

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Here are the built-in functions with the option Heads True.

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