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→Variables / Parameters
<b>User-defined variables</b> are variables that can be used in the shell script for '''customized''' purposes.
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Data can be stored and removed within a variable using an '''equal sign''' (no spaces on either side of equal sign).<br><br>The '''read''' command can be used to prompt the user to enter data into a variable. The '''readonly''' command will prevent <br>the current value of the variable for the remainder of the execution of a shell script.<br><br>
'''Positional Parameters and Special Parameters'''
