Loops

Question 1

Write the While Loop Structure

Answer 1

while(somecondition){
//repeat code in the squiggly brackets if the condition is true
}

Question 2

As long as the condition is true in the ( ) of loop conditions, the code in the { } will repeat ______

Answer 2

indefinetly

Question 3

What conditions can be placed in the ( ) of while loops?

Answer 3

same conditions used in if statements

Question 4

What will this code do:

int intNumber;

intNumber = 3

while (intNumber <= 5){
con.println(“Wahoo”);
}

Answer 4

print “Wahoo” indefinetly

Question 5

What will this code do:

intNumber = 5;

while (intNumber <= 5){
con.println(“Wahoo”);
}

Answer 5

print Wahoo indefinetly

Question 6

What will this code do:

intNumber = 10;

for (intNumber <= 5){
con.println(“Wahoo”);
}

Answer 6

print nothing

Question 7

Function of the Looping Structures

Answer 7

repeat whatever is in the { } as long as the condition is true

Question 8

repeat whatever is in the { } as long as the condition is true

Answer 8

Function of the Looping Structures

Question 9

When do loops (while/for) stop repeating?

Answer 9

Once condition inside ( ) is false

Question 10

Function of Inatializing Variables

Answer 10

to give variables default values

Question 11

number variables are usually initialized to ______

Answer 11

0

Question 12

string variables are usually intialized to _____

Answer 12

empty double quotes (i.e. “”)

Question 13

to give variables default values

Answer 13

Function of Initializing Variables

Question 14

Write the code to check if a string does NOT include certain characters

Answer 14

!strVariable.equalsIgnoreCase(“xxx”)

Question 15

Function of:

!strVariable.equalsIgnoreCase(“xxx”)

Answer 15

checks if a string does NOT include certain characters

Question 16

Write the general structure of a for loop statement

Answer 16

for(intCount = #; intCount [math comparison symbol] #; intCount++/–){
// repeat code if condition is true, until it is false
}

Question 17

increment symbol

Answer 17

++

Question 18

++

Answer 18

increment symbol

Question 19

_ _

Answer 19

decrement symbol

Question 20

decrement symbol

Answer 20

_ _

Question 21

3 Parts in a For Loop Condition

Answer 21

1. Intialize Variable to Default Value
2. Condition Check
3. Count Up (Increment) or Count Down (Decrement)

Question 22

statements that are done once are placed…

Answer 22

outside the { }

Question 23

What does this code do:

dblTotal = dblTotal + dblNumber;

Answer 23

add the old value in dblTotal to dblNumber
input the result to dblTotal, giving it a new value

Question 24

.length();

Answer 24

measures the length of any string

Question 25

string logic comparison which measures the length of a string

Answer 25

.length();

Question 26

Function of:

strVariable2 + strVariable1

Answer 26

attaches (concatenating) two strings together
i.e. a + b = ab

Question 27

Function of (int) in the following code:

intRand = (int)(Math.random()*100 + 1);

Answer 27

Casting… forces the double to be an integer
- cuts off the decimals

Question 28

Function of Math.random()

Answer 28

generates dbl numbers between 0.0000000-0.999999999

Question 29

Write code which prints random ingeters between 1-100

Answer 29

int intRandom;

intRandom = (int)(Math.random()* 100+1);
con.println(intRandom);

Question 30

Write a program that prints the largest of five entered numbers (using if statements or Math.max()).