Changes

Jump to: navigation, search
Control Flow Statements
'''Control Flow Statements''' are used to make your shell scripts<br>more '''flexible''' and can '''adapt''' to changing situations.<br><br>In order to use control flow statements, you need to test a condition to get<br>'''TRUE''' (zero value) or '''FALSE''' (non zero value). This can be done two ways:<ul><li>Run a command to get the exit status (<span style="font-family:courier;font-weight:bold;">$?</span>)</li><li>Use the '''test''' command</li></ul><br>Refer to the diagrams on the right to see how to use the test command.<br><br>
You CANNOT use the <span style="font-family:courier;font-weight:bold;">&lt;</span> or <span style="font-family:courier;font-weight:bold;">&gt;</span> symbols when using the test command since these are redirection symbols. Instead, you need to use '''options ''' when performing numerical comparisons.
Refer to the diagrams to the right '''test options''' and their purposes.
<br><br>
13,017
edits

Navigation menu