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BitLength

BitLength[n]
gives the number of binary bits necessary to represent the integer n.

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For positive n, BitLength[n] is effectively an efficient version of Floor[Log[2, n]]+1.

For negative n it is equivalent to BitLength[BitNot[n]].

Basic Examples (1)

Log IntegerLength IntegerExponent MantissaExponent IntegerDigits BitShiftRight ByteCount

Integer and Number Theoretic Functions

Bitwise Operations

Integer Functions

Memory Measurement & Optimization

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