bash:commands:command_line_arguments
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| bash:commands:command_line_arguments [2021/01/26 16:57] – created peter | bash:commands:command_line_arguments [2021/01/26 17:03] (current) – peter | ||
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| Getting arguments directly from the command shell can be beneficial in a number of cases. | Getting arguments directly from the command shell can be beneficial in a number of cases. | ||
| - | <code bash> | + | <file bash test.sh> |
| #!/bin/bash | #!/bin/bash | ||
| echo "Total arguments : $#" | echo "Total arguments : $#" | ||
| echo "First Argument = $1" | echo "First Argument = $1" | ||
| echo " | echo " | ||
| - | </code> | + | </file> |
| Run this script with two additional parameters after its name. | Run this script with two additional parameters after its name. | ||
| - | |||
| - | I’ve named it test.sh and the calling procedure is outlined below. | ||
| <code bash> | <code bash> | ||
| Line 18: | Line 16: | ||
| </ | </ | ||
| - | $1 is used for accessing the first argument, $2 for the second, and so on. | + | <WRAP info> |
| + | **NOTE: | ||
| - | The $# is used for getting the total number of arguments. | + | The **$#** is used for getting the total number of arguments. |
| + | |||
| + | </ | ||
| ---- | ---- | ||
| Line 28: | Line 29: | ||
| The below example shows how to get command-line arguments with their names. | The below example shows how to get command-line arguments with their names. | ||
| - | <code bash> | + | <file bash test.sh> |
| #!/bin/bash | #!/bin/bash | ||
| Line 47: | Line 48: | ||
| echo " | echo " | ||
| - | </code> | + | </file> |
| - | Name this script | + | Run this script |
| <code bash> | <code bash> | ||
| Line 55: | Line 56: | ||
| </ | </ | ||
| - | It should return | + | returns |
| + | |||
| + | <code bash> | ||
| + | X+Y=144 | ||
| + | </ | ||
| + | |||
| + | <WRAP info> | ||
| + | **NOTE: | ||
| + | </ | ||
| - | The arguments here are stored inside ‘$@‘ and the script fetches them using the Linux cut command. | ||
bash/commands/command_line_arguments.1611680227.txt.gz · Last modified: 2021/01/26 16:57 by peter