IDL script

IDL <<EOF
print,'this is a script'
exit
EOF

• intest.pro contains:

pro intest
 read, one
 read, two
 print, one, two
end

• input.dat contains:

 1
 2

• callintest.pro contains

 intest
 exit

• To run:

cmd> idl callintest < input.dat 

% Compiled module: INTEST. 1.00000 2.00000