True and false (commands) True and false (commands) In Unix-like operating systems, codice_1 and codice_2 are commands whose only function is to always return with a predetermined exit status. Programmers and scripts often use the exit status of a command to assess success (exit status zero) or failure (non-zero) of the command. The codice_1 and codice_2 commands represent the logical values of command success, because "true" returns 0, and "false" returns 1. The commands are usually employed in conditional statements and loops of shell scripts. For example, the following shell script repeats the "echo hello" loop until interrupted: while true do done The commands
Campbell's Soup Cans Rock & Roll shows and fan magazines. Whereas previous artists used repetition to demonstrate their skill at depicting variation, Warhol coupled "repetition" with "monotony" as he professed his love of artwork themes. Warhol followed the success of his original series with several related works incorporating the same theme of Campbell's Soup cans subjects. These subsequent works along with the original are collectively referred to as the Campbell's Soup cans series and often simply as the Campbell's Soup cans. The subsequent Campbell's Soup can works were very diverse. The heights ranged from to . Generally, the cans were portrayed as if