19 lines
481 B
Text
19 lines
481 B
Text
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--| `subtract m n` computes `n - m`, truncating to `0` if `m > n`
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let subtract
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: Natural → Natural → Natural
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= Natural/subtract
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let example0 = assert : subtract 1 2 ≡ 1
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let example1 = assert : subtract 1 1 ≡ 0
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let example2 = assert : subtract 2 1 ≡ 0
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let property0 = λ(n : Natural) → assert : subtract 0 n ≡ n
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let property1 = λ(n : Natural) → assert : subtract n 0 ≡ 0
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let property2 = λ(n : Natural) → assert : subtract n n ≡ 0
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in subtract
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