I just install Julia, along with LinearAlgebra package.
When I type
A = [1 2 3 4; 4 5 6 7]
rref(A)
My terminal said
ERROR: UndefVarError: rref not defined
Stacktrace:
[1] top-level scope at REPL[22]:1
I am sort of confused. Do I need to install certain package in order to use reef function?