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printf examples

S/N	Task	Example
	print left justified	`printf "%-10s" "hello"` `hello`
	print right justified	`printf "%10s\n" "hello"` `hello`
	print middle justified
	pass the width as argument	`printf "%*f\n" 10 10` `10.000000`
	pass width and precision as argument	`printf "%.f\n" 10 2 10` `10.00`