U3: Loops

Question 1

Loops

Answer 1

• Allow programmer to see patterns in problems and write program accordingly
• Limited code repeats infinitely

Question 2

Infinite Loop

Answer 2

Loop that doesn’t stop (not good for program)

Question 3

For Loop [A]

Answer 3

• Exists in wide variety of languages; works similarly in all
• Has built-in variable keeping track of no. of loop executes

Question 4

For Loop [B]

Answer 4

• Starts at certain number; ends at certain number
• Can be incremented or decremented by given number

Question 5

Purpose of For Loop

Answer 5

• When times loop needed to execute already known
• When variable used to indicate no. of loop executes

Question 6

While Loops

Answer 6

• Used when programmer doesn’t know no. of times loop needs to repeat
• while; do while

Question 7

“While” Loop

Answer 7

Used for executing loop +0 times

Question 8

“Do While” Loop

Answer 8

Used for executing loop +1 times

Question 9

System.out.print vs. system.out.println

Answer 9

• System.out.print prints in single line repeatedly
• System.out.println prints in different lines repeatedly

Question 10

How User Input Influences Loops

Answer 10

Can change no. of times loop executes; exit program

Question 11

Data Structure

Answer 11

• Specific way to organize large amounts of same type of data
• Can store, process and output data
• Arrays, stacks, queues, linked lists

Question 11

Nested Loops

Answer 11

Loops inside of loops