[julia-users] Why does the following give an error: p = 1; 2p+1 ??

[Ronald L. Rivest]

I'm using Julia 0.3.4 command line.
Entering
    p = 1;  2p+1
gives an error:

    *julia> p = 1; 2p+1*

*    ERROR: syntax: malformed expression*

whereas using a different variable name doesn't give an error

    *julia> x = 1; 2x+1*

*    3*

There must be some aspect of Julia syntax I have missed??

Thanks for any light you can shed on this...

Cheers,

Ron Rivest