Scenario – It is Saturday night, and you are watching the Lottery draw for Fanta

Question

Scenario – It is Saturday night, and you are watching the Lottery draw for Fantasy Five. You get inspired to write a program to generate 10 lotto tickets, each ticket has 5 Lotto numbers. What loop should you use, and why? With using only while, do while, or for loops

Scenario – You go to an arcade with 100 tokens, and each game costs a variable number of tokens. What loop should you use, and why?

Scenario – You are playing a guessing game with your little cousin. She wants you to guess her favorite color. What loop should you use for that, and why?

Explanation / Answer

Scenario 1–

We will use two nested while loops as follows:

int ticket =1;

while(ticket <= 10)

{

Lotto_numbers = []

int n = 1;

while(n<=5)

{

int tmp = random_integer();

Lotto_numbers.append( tmp );

n = n + 1;

}

ticket = ticket + 1;

}

Outer While loop will iterate over tickets 1 to 10 and inner while loop will generate 5 Lotto numbers for each ticket.

Scenario 2–

We will use one while loop as follows:

tokens = 100;

while(tokens > 0)

{

current_game = Choose_game();

tokens = tokens - Cost_of(current_game);

}

This while loop will iterate untill all the tokens are used.

Scenario 3–

We will use a for loop.

Colors = Array containing all color names;

for(int i = 0; i< Colors.length(); i++)

{

if(Colors[i] is favorite color )

{

We are done;

break;

}

else

{

Continue();

}

}

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