whenever we know the number of iterations in advance means we know how many times we need to execute the program then we go for loop
whenever we don't know the number of iterations in advance, we don't know how many times we need to execute the program then we go for while loop
I want to execute my loop body at least once irrespective of the condition then we can go for do-while
do and then check the condition
what is nested for loop?
A for loop inside a for loop is called nested for loop
what is nested while loop?
A while loop inside a while loop is called nested while loop
A loop inside another loop is called nested loop
for (init section; condition; inc/dec section)
{
;;;;;;;;;;;
for (init section; condition; inc/dec section)
{
;;;;;;;;;;;
}
}
Example:
public class LoopsDemo{
public static void main(String[] args) {
for (int i=0; i<3; i++) // outer loop
{
System.out.println("OL: " + i);
for(int j=0; j<=3; j++) // inner loop
{
System.out.println("IL: "+j);
}
}
}
}
// once the control is coming to the inner loop, this inner loop is executed till the condition is false
OUTPUT:
OL: 0
IL: 0
IL: 1
IL: 2
IL: 3
OL: 1
IL: 0
IL: 1
IL: 2
IL: 3
OL: 2
IL: 0
IL: 1
IL: 2
IL: 3
OL: 3
IL: 0
IL: 1
IL: 2
IL: 3
we saw break and continue in switch case.
break:
a break is a keyword or a statement which we can use inside the switch cases and which we can use inside the looping mechanism that can be while, do-while, nested, and for loop
continue:
based on some condition if we want to skip the current iteration then we go for continue
public class LoopsDemo{
public static void main(String[] args) {
for (int i=0; i<=5; i++) // outer loop
{
System.out.println(i);
if (i==2) {
break; // directly it comes out of for loop
}
}
System.out.println("OOFL");
}
}
OUTPUT:
0
1
2
OOFL
continue:
public class LoopsDemo{
public static void main(String[] args) {
for (int i=0; i<=5; i++)
{
if (i==2) {
continue; // skips current iteration
}
System.out.println(i);
}
System.out.println("OOFL");
}
}
OUTPUT:
0
1
3
4
5
OOFL
break:
public class LoopsDemo{
public static void main(String[] args) {
for (int i=0; i<=5; i++)
{
if (i==2) {
break ;
}
System.out.println(i);
}
System.out.println("OOFL");
}
}
OUTPUT:
0
1
2
OOFL
PART 1 completed
part1 java basics
part2 oops
part3 selenium
part4
frameworks
No comments:
Post a Comment