UseArgs takes command line arguments

1. compile UseArgs:
> javac UseArgs.java

2. run without arguemnts:
> java UseArgs

3. run with arguemnts:
> java UseArgs hello 123 xyz

read UseArgs.java, and undersatnd what it does

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1. compile InOutExample:
> javac InOutExample.java

2. run with a small positive int as an argument:
> java InOutExample 5

3. run with a larger positive int as an argument:
> java InOutExample 20

4. run without an argument:
> java InOutExample

5. run with an argument that is not an int:
> java InOutExample ABC


See what it does in each case
read InOutExample.java, and undersatnd what it does

