Section 5.2 Loops-WE1-P1
Subsection 5.2.1 Subgoals for Evaluating a Loop
Diagram which statements go together.
-
Define and initialize variables
Determine the start condition.
Determine the update condition.
Determine the termination condition.
Determine body that is repeated.
-
Trace the loop.
For every iteration of the loop, write down the values.
Subsection 5.2.2 Loops-WE1-P1
Exercises Exercises
1.
See diagram for answer A
See diagram for answer B
See diagram for answer C
See diagram for answer D
See diagram for answer E
Q1: What is the output of the following loop?
int i = 0;
while (i < 3) {
System.out.println("hi");
i++;
}
2.
10 9 8 7 6 5 4 3 2 1
9 8 7 6 5 4 3 2 1
9 8 7 6 5 4 3 2
10 9 8 7 6 5 4 3 2
compiler error
Q2: What is the output of the following loop?
int i = 10;
while (i > 1) {
System.out.println(i + " ");
i--;
}
3.
10 11 12 13 14 15 16
10 9 8 7 6 5 4 3 2
10 9 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8 9 10
infinite loop
Q3: What is the output of the following loop?
int i = 10;
while (i > 1) {
System.out.println(i + " ");
i++;
}
4.
0 5 10 15 20 25 30 35 40 45 50
0 5 10 15 20 25 30 35 40 45
5 10 15 20 25 30 35 40 45 50
5 10 15 20 25 30 35 40 45
55
Q4: What is the output of the following loop?
int i = 0;
int total = 0;
while (i <= 50) {
total += i;
i += 5;
}
System.out.println(i);
5.
0
1
99
100
101
Q5: What is the value of counter after the execution of the folowing code?
int counter = 0;
while (counter > 100) {
if (counter % 2 == 1)
System.out.println(counter + " is odd.");
else
System.out.println(counter + " is even.");
}
counter++;
System.out.println(counter);