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日期:2024-08-17
Here is a simple example that uses the while loop to display the numbers zero to nine: #!/bin/sh a=10 while [ $a -ge 10 ] do echo $a a=`expr $a + 1` done....
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日期:2024-08-17
A while loop allows execution of a code block an arbitrary number of times until a condition is met. This tech-recipe describes the while loop syntax for the various Bourne shells (sh, ksh, bash, zsh, etc.) and provides examples. The general syntax is as ...
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日期:2024-08-18
Hi, I'm sure this is possible as this is a very basic programming technique. What I'm after is a while loop with multiple conditions - or (||) between ... Hi again, Once you enter the loop, you cannot leave it if you depend on the content of the value var...
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日期:2024-08-17
Infinite while loop example: while [ 1 ] do echo "infinite while loop example" done Infinite while loop in a single line: while [ 1 ]; do echo "infinite while loop example"; done -Sany...
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日期:2024-08-18
In any programming language there is looping structure. Looping is used to do a repeating task with one instruction. Bash shell supports for and while loop. The basic structure of for and while loop is, 1)Variable initialization. 2)Checking condition. 3)E...
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日期:2024-08-20
15 Mar 2008 ... Explains how to use a Bash while loop control flow statement under Linux / UNIX / BSD / Mac OS X bash shell with examples....
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日期:2024-08-21
As you see the ... As you see the if statement can nested, similarly loop statement can be nested. You can nest the for loop. To understand the nesting of for loop see the following shell script....
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日期:2024-08-19
Note the first syntax is recommended as : is part of shell itself i.e. : is a shell builtin command. A menu driven program using while loop The following menu driven program typically continues till user selects to exit by pressing 4 option. The case stat...