Binary shift operators don't work

[jclsn]

Binary shift operators don't work

[VittoDan]

could it be a bash issue since the character "<" and the string "<<" are reserved for putting a file to stdin and for heredocs respectively?

A way to do it is to pass it as a string like so:

pcalc "20 << 3"

In this way the string is perceived as a single parameter instead of a bash redirect/heredoc

[vapier]

yes, that error is from the shell. you need to quote the arguments

[jclsn]

Ah yeah thanks