Java Reference
In-Depth Information
These errors often occur when you use the next-line block style. Using the end-of-line
block style can avoid errors of this type.
In the case of the
do-while
loop, the semicolon is needed to end the loop.
int
i =
0
;
do
{
System.out.println(
"i is "
+ i);
i++;
}
while
(i <
10
)
;
Correct
✓
✓
4.15
Can you convert a
for
loop to a
while
loop? List the advantages of using
for
loops.
Check
4.16
Point
Can you always convert a
while
loop into a
for
loop? Convert the following
while
loop into a
for
loop.
int
i =
1
;
int
sum =
0
;
while
(sum <
10000
) {
sum = sum + i;
i++;
}
4.17
Identify and fix the errors in the following code:
1
public class
Test {
2
public void
main(String[] args) {
3
for
(
int
i =
0
; i <
10
; i++);
4 sum += i;
5
6
if
(i < j);
7 System.out.println(i)
8
else
9 System.out.println(j);
10
11
while
(j <
10
);
12 {
13 j++;
14 }
15
16
do
{
17 j++;
18 }
while
(j <
10
)
19 }
20 }
4.18
What is wrong with the following programs?
1
public class
ShowErrors {
2
1
public class
ShowErrors {
2
public static void
main(String[] args) {
3
for
(
int
i =
0
; i <
10
; i++);
4 System.out.println(i +
4
);
5 }
6 }
public static void
main(String[] args) {
3
int
i;
4
int
j =
5
;
5
6
if
(j >
3
)
7 System.out.println(i +
4
);
8 }
9 }
(a)
(b)
