b [
line
] [
condition
]
Sets a breakpoint at
line
, which must begin an
executable statement. If
line
is omitted, sets a
breakpoint on the line that is about to be executed.
condition
,
if given, is evaluated each time the statement is reached, and a
breakpoint is taken if
condition
is true:
b 237 $x > 30
b 33 /pattern/i
