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#elisp
Function: logand &rest ints-or-markers

This function returns the “logical and” of the arguments: the n th bit is set in the result if, and only if, the n th bit is set in all the arguments.

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GNU Emacs Lisp Reference Manual: Bitwise Operations
; = 0000...000001 (ash 5 -2) ⇒ 1 (lsh -5 -2) ; -5 = 1111...111011 ⇒ 268435454 ; = 0011...111110 (ash -5 -2) ; -5 = 1111...111011 ⇒ -2 ; = 1111...111110 <span>Function: logand &rest ints-or-markers This function returns the “logical and” of the arguments: the n th bit is set in the result if, and only if, the n th bit is set in all the arguments. (“Set” means that the value of the bit is 1 rather than 0.) For example, using 4-bit binary numbers, the “logical and” of 13 and 12 is 12: 1101 combined with 1100 produces 1100. In bo


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