True and false (commands) Bash: 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
Val de Cans International Airport Val de Cans International Airport Belém/Val de Cans–Júlio Cezar Ribeiro International Airport is the main airport serving Belém, Brazil. Val de Cans (sometimes spelled Val de Cães) is the name of the neighborhood where the airport is located. Since 13 April 2010 the airport is named also after (1837–1887) a researcher of balloons. It is operated by Infraero. Some of its facilities are shared with Belém Air Force Base of the Brazilian Air Force. In 1934 General Eurico Gaspar Dutra, then the Director of the Military Aviation, appointed Lieutenant Armando Sierra de Menezes to choose in Val de Cans a