COMPUTER SCIENCE AND ENGINEERING
UNIX
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1$
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$3
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$$
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$1
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Detailed explanation-1: -Explanation: Command line arguments are stored into positional parameters. The first argument is read by the shell into the parameter $1, second argument in $2 and so on.
Detailed explanation-2: -We also have $ and $* as wildcard characters which are used to denote all the arguments. We use $$ to find the process ID of the current shell script, while $? can be used to print the exit code for our script.
Detailed explanation-3: -Arguments passed to a script are processed in the same order in which they’re sent. The indexing of the arguments starts at one, and the first argument can be accessed inside the script using $1. Similarly, the second argument can be accessed using $2, and so on.
Detailed explanation-4: -$?-It gives the value stored in the variable “?". Some similar special parameters in BASH are 1, 2, *, # ( Normally seen in echo command as $1, $2, $*, $#, etc., ) . Follow this answer to receive notifications. edited Jun 20, 2020 at 9:12. CommunityBot.