public class Project$1\{$

public static void main$($String$[]$ args$)\{$

$//$first problem

double problem$1=4*(1\mathrm{.}0-(1\mathrm{.}0/3\mathrm{.}0)+(1\mathrm{.}0/5\mathrm{.}0)-(1\mathrm{.}0/7\mathrm{.}0)+(1\mathrm{.}0/9\mathrm{.}0)-(1\mathrm{.}0/11\mathrm{.}0)+(1\mathrm{.}0/13\mathrm{.}0))$ ;

$//$second problem

double problem$2=4*(1-(1/3)+(1/5)-(1/7)+(1/9)-(1/11)+(1/13))$ ;

$//$print the results

System.out.println$("$Result of the first problem: $"+$ problem$1)$;

System.out.println$("$Result of the second problem: $"+$ problem$2)$;

$//$The difference between the two outputs is that in the first problem

$//$it will give the output in decimal where the second problem the output

$//$will be rounded up the decimal to its nearest integer value.

$//$The first problem is the better option because by using the floating

$//$point division we get the most accurate and precise result where as

$//$the second output gives a round up result.

$\}$

$\}$