Java Programming $1$ Lab $6$:

Lab Problems

For all problems, use inline comments to describe major actions. Ask for assistance if needed.

$1.$ do$-$while and Sentinel$-$Controlled Loops $$ Write a Java program named LabO$6$Prob$01.$java using a do$-$while loop. During execution of the loop, ask the user for floating$-$point values from $-100\mathrm{.}0-100\mathrm{.}0$ and determine the largest and smallest of those numbers. Any numbers outside of the range should be ignored. The loop should exit once the user enters a value of $-19.5.1.$ After the loop exits, provide descriptive text to indicate both the smallest and largest values entered up to one decimal place. The sentinel value should not be included in any calculations and you should account for the situation where NO valid values are entered

and not print a max$/$min$.$

For example, for the values $100\mathrm{.}7,50\mathrm{.}2,-201\mathrm{.}1,701\mathrm{.}7,11\mathrm{.}3,-15\mathrm{.}7,14\mathrm{.}4,37\mathrm{.}4,-19\mathrm{.}5$ the max

value is $50\mathrm{.}2$ and the min value is $-15\mathrm{.}7.$

Expected Output $($valid values$)$:

The max value was $50\mathrm{.}2$

The min value was $-15\mathrm{.}7$

Expected Output $($no valid values$)$:

There were no valid values

Note that the grader will provide its own input for this program and your program should correctly calculate the values for the given input, not just your tested values.

$2.$ Recall that for loops can be used to calculate approximations that are represented using running sums from one number to another number. For instance, a running sum of values from $0-50($inclusive on both ends$)$ can be represented in Java code as:

int sum $=0$;

for $($int i $=0$; i $<=50$; i$++)\{$

sum $+=$ i; $//$ calculate each term

$\}$

Write a Java program named Lab$06$Prob$02.$java that calculates the series represented by:

$250$

DY $(2$i$+1)$

i$=5$

The program should calculate the series value based on the given summation using a for

loop and display the final result with descriptive text, and auto$-$placed commas.

HINT: This should result in a sum of $21,084,086.$

Expected Output:

The sum is $21,084,086$

while Loops $($Sentinel$-$Controlled$)$ Write a Java program named LabO$6$Prob$03.$java that contains a while loop that can be controlled using a sentinel value. Write your loop so that only positive, even integer values are summed up and the resulting average of those numbers is output to the console once the sentinel value of $672$ is entered.

After the loop exits, provide output that includes descriptive text, the calculated sum, and the calculated average which should be limited to four decimal places. The sentinel value should not be included in any calculations. For instance, input of $4,2,-5,-7,8,3,7,672$ should provide a sum of $(4+2+8)=14$ and an average of $14/3$ ~$=4\mathrm{.}6667.$

Expected Output:

For the positive, even numbers, the sum was XX and the average was X$.$XXXX

Note that the grader will provide its own input for this program and your program should correctly calculate the values for the given input, not just your tested values.