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
Midfielder as wingers behind a lone striker. In a three-man midfield, specialist wingers are sometimes deployed down the flanks alongside the central midfielder or playmaker. Even more demanding is the role of wing-back, where the wide player is expected to provide both defence and attack. As the role of winger can be classed as a forward or a midfielder, so this role blurs the divide between defender and midfielder. A winger is an attacking midfielder who is stationed in a wide position near the touchlines. Wingers such as Stanley Matthews or Jimmy Johnstone used to be classified as forwards in traditional