From bignum ...loaded and any constant number will be converted to an object (Math::BigFloat for floats like 3.1415 and Math::BigInt for integers like 1234).

$num is not a constant, 0 is a constant, and 0 + $num is a Math::BigInt

In reply to Re: 'use bignum' scoping question by Anonymous Monk
in thread 'use bignum' scoping question by si_lence

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