system() -- hand a statement over to your operating system and return its exitcode

 
ret=system("foo") 
system("bar") 

The system-command accepts a single string argument, which specifies a command to be executed. The function will return the exitcode of the command; its output (if any) will be lost.

print "Please enter the name of the file, that should be deleted." 
input f$ 
if (system("rm "+f$+" >/dev/null 2>&1")) then 
	print "Error!" 
else 
	print "okay." 
endif 

This program uses the commandline command rm to remove a file.