2 free - free the memory used to store values of lvalues
13 Those of the arguments a, b, ... that specify lvalues are assigned
14 the null value, effectively freeing whatever memory is used to
15 store their current values. Other arguments are ignored.
17 free(.) frees the current "old value".
21 > mat M[3] = {1, list(2,3,4), list(5,6)}
22 > print memsize(a), memsize(M)
26 > print memsize(a), memsize(M)
36 freeglobals, freestatics, freeredc