What are the Default package of java, CONTROL STATEMENT,LOOPING,programs using conditional statements (EVEN NUMBER AND ODD NUMBER) to learn Selenium??
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Default package of java:
- lang
- ctrl+2à+Là this shortcut is used to find the data type Syntax: to get the values from the user
- byteànextByte();
- ShortànextShort();
- intànextInt();
- longànextLong();
- floatànextFloat();
- doubleànextDouble();
- charànext().charAt(0);
- Stringànext();
- StringànextLine();
- booleanànextBoolean();
String:
nextLine() is used to include space String.s=sc.nextLine();
WRAPPER CLASS:
- Classes of data types is called wrapper class
- It is used to convert any data type into object
- All classes and wrapper classes default value is Null
CONTROL STATEMENT:
- if
- if.else
- else.if
variable nameà camel notation
Difference between “=” and “==”à
- = is used to assigning the value
- == is used for condition checking
Example Program:
public class IfCondition {
public static void main(String[] args) {
int empID=20;
if(empID==20){
System.out.println(“valid”);
}else {
System.out.println(“not valid”);
}
}
}
Outputà valid
- More than one condition we use for
- logical &&,//à logical && check first condition if its fail it doesn’t check second 2.Bitwise &,/à bitwise & is check both conditions
So logical && is better than bitwise
LOOPING:
- for
- while
- while
For:
Example Program:
public class ForLoop {
public static void main(String[] args) {
System.out.println(“Start”);
for (int i = 1; i <= 3; i++) {
System.out.println(i);
}
System.out.println(“End”);
}
}
output:
Start
1
2
3
End
Inner for loop;
Example Program:
public class InnerForLoop {
public static void main(String[] args) {
for (int i = 1; i <= 5; i++) {
for (int j = 1; j <= 6; j++) {
System.out.print(i);
}
System.out.println();
}}}
Output:
111111
222222
333333
444444
555555
Printlnà printline
Break:
- It will exit from the current loop
Example Program:
public class InnerForLoop {
public static void main(String[] args) {
for (int i = 1; i <= 10; i++) {
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if (i == 5) {
break;
}
System.out.println(i);
}
}}
Output:
1
2
3
4
Continue:
- It will skip the particular iteration
Example Program:
public class InnerForLoop {
public static void main(String[] args) {
for (int i = 1; i <= 10; i++) {
if (i == 5) {
continue;
}
System.out.println(i);
}
}
}
Output
1
2
3
4
6
7
8
9
10
Basic programs using conditional statements:
EVEN NUMBER AND ODD NUMBER:
To print Even num:
Example Program:
public class InnerForLoop {
public static void main(String[] args) {
for (int i = 1; i <= 20; i++) {
if (i % 2 == 0) {
System.out.println(i);
}
}
}
}
output
2
4
6
8
10
12
14
16
18
20
To print Odd:
Example Program:
public class InnerForLoop {
public static void main(String[] args) {
for (int i = 1; i <= 20; i++) {
if (i % 2 == 1) {
System.out.println(i);
}
}
}
}
Output
1
3
5
7
9
11
13
15
17
19
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