Operating System Lab (os) shell programming cs693

in shell programming# is a single line comment. for comments. There is no dedicated multi-line comment mechanism in shell that is analogous to the slash-star /* */ form in C-like languages. echo HELLO WORLD! #Add mul sub and div echo enter first numberread aecho enter second numberread badd=`expr $a + $b`sub=`expr $a – $b`mul=`expr $a …

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