what does this statement mean for expect or for bash?

what does this statement mean for expect or for bash?

References

Reference NO 1

http://stackoverflow.com/questions/15200994/what-does-this-statement-mean-for-expect-or-for-bash

Reference NO 2

http://stackoverflow.com/questions/9319432/mixing-expect-and-bash

Reference NO 3

http://stackoverflow.com/questions/11267569/bash-multiple-expression-if-statement

Reference NO 4

http://stackoverflow.com/questions/7487964/bash-expect-scp-problem-on-multiple-files

Reference NO 5

http://wiki.tcl.tk/11583

Reference NO 6

http://www.softpanorama.info/Scripting/Shellorama/Control_structures/if_statements.shtml

Reference NO 7

http://wiki.bash-hackers.org/howto/getopts_tutorial

Reference NO 8

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