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
Frozen in Time: The Fate of the Franklin Expedition large factors in the deaths of these men. Near the gravesite, Beattie had discovered a pile of tin cans, which was the storage for food on the Franklin expedition. Through forensic testing, the lead soldering found on the cans matched the lead found in the bodies, determining that lead from the cans had contaminated the food supply and caused the deaths of many in the Franklin expedition. There is a portion of the book in which Beattie and Geiger use the evidence to theoretically reconstruct the final hours of the three Franklin crewmen in a way they believe may have