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Ingy döt Net 2023-07-01 11:58:00 -04:00
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commit cb5bb5e222
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Task/Infinity/Tcl/infinity-1.tcl Normal file
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package require Tcl 8.5
expr {1.0 / 0} ;# ==> Inf
expr {-1.0 / 0} ;# ==> -Inf
expr {inf} ;# ==> Inf
expr {1 / 0} ;# ==> "divide by zero" error; Inf not part of range of integer division

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Task/Infinity/Tcl/infinity-2.tcl Normal file
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% format %lx -1 ;# all bits set
ffffffffffffffff
% regsub f 0x[format %lx -1] 7 ;# unset the sign bit for positive
0x7fffffffffffffff
% set ii [expr [regsub f 0x[format %lx -1] 7]] ;# show as decimal
9223372036854775807
% incr ii
9223372036854775808 ;# silently upgrade to unbounded integer, still positive