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Since in java the first position of an array is 0, if an array has
length 3 then the last element is in position 2.
Ex: array = [elem0, elem1, elem2] then the last elem is index 2
and the array has length 3
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int b = Integer.parseInt(args[3]);
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int b = Integer.parseInt(args[3]);
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int b = Integer.parseInt(args[long]);
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Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 4 out of bounds for length 4
at Assignment4.main(Assignment4.java:11)