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5.2.3 breakpoint

breakpoint( proc_name );
breakpoint( proc_name, line_no );
sets a breakpoint at the beginning of the specified procedure or at the given line.
Note: Line number 1 is the first line of a library (for procedures from libraries), resp. the line with the {.
A line number of -1 removes all breakpoint from that procedure.
==> breakpoint 1, at line 846 in groebner
breakpoint(groebner, 176);
==> breakpoint 2, at line 176 in groebner
breakpoint(groebner, -1);
==> breakpoints in groebner deleted(0x6)
See Source code debugger; ~.