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.TH ZBTEST 3 libzahl
.SH NAME
zbtest - Test a bit in a big integer
.SH SYNOPSIS
.nf
#include <zahl.h>
int zbtest(z_t \fIa\fP, size_t \fIindex\fP);
.fi
.SH DESCRIPTION
.B zbtest
returns whether the bit with the specified
.I index
is set in
.IR a .
.SH RETURN VALUE
.B zbtest
returns 1 if the bit is set, or 0 otherwise.
.SH SEE ALSO
.BR zand (3),
.BR zor (3),
.BR zxor (3),
.BR znot (3),
.BR zlsh (3),
.BR zrsh (3),
.BR zsplit (3),
.BR zlsb (3),
.BR zbits (3)
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