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Because the while loop checks the condition/expression before the block is executed, the control structure is often also known as a pre-test loop. Compare this with the do while loop, which tests the condition/expression after the loop has executed. For example, in the languages C, Java, C#, [2] Objective-C, and C++, (which use the same syntax ...
These screenshots demonstrate the GNU plotutils version of graph when run in an xterm, exploiting xterm's ability to emulate a Tektronix 4010 plotter. This demo was run on Ubuntu , which makes GNU plotutils available as an optional package; many other Linux distributions and other Unix-like systems do the same.
This functions similarly to Bash's Ctrl+R history search, but is always on, giving the user continuous feedback while typing commands. Fish also includes feature-rich tab completion , with support for expanding file paths (with wildcards and brace expansion ), environment variables , and command-specific completions.
One example of this is Bash, which offers the same grammar and syntax as the Bourne shell, and which also provides a POSIX-compliant mode. [13] As such, most shell scripts written for the Bourne shell can be run in BASH, but the reverse may not be true since BASH has extensions which are not present in the Bourne shell.
The Bash command-line completion system is very flexible and customizable, and is often packaged with functions that complete arguments and filenames for specific programs and tasks. Bash's syntax has many extensions lacking in the Bourne shell. Bash can perform integer calculations ("arithmetic evaluation") without spawning external processes.
If xxx1 is omitted, we get a loop with the test at the top (a traditional while loop). If xxx2 is omitted, we get a loop with the test at the bottom, equivalent to a do while loop in many languages. If while is omitted, we get an infinite loop. The construction here can be thought of as a do loop with the while check in the middle. Hence this ...
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Do-while 루프; Usage on lv.wikipedia.org Cikls (programmēšana) Usage on ms.wikipedia.org Gelung do while; Usage on sh.wikipedia.org Do while petlja; Usage on sr.wikipedia.org Do while петља; Usage on uk.wikipedia.org Цикл do while; Usage on vi.wikipedia.org Vòng lặp do while; Usage on zh-yue.wikipedia.org Do-while 迴圈