8 lines
160 B
Ruby
8 lines
160 B
Ruby
2.1.1 :001 > a = 2**62 -1
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=> 4611686018427387903
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2.1.1 :002 > a.class
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=> Fixnum
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2.1.1 :003 > (b = a + 1).class
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=> Bignum
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2.1.1 :004 > (b-1).class
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=> Fixnum
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