Prints a list of all the top-level commands, as shown in Figure 1. The command ? (with or without a terminating semicolon) has the same effect.
This gives a description of function funname, including the documentation from the manual .
This prints the names of all the NESL functions and variables that contain the string name in either their name or their documentation string.
show code funname;
This displays the NESL code for function funname. Code cannot be shown for primitive functions.