Operator's String And Loop's with a tint of if and else.
Tags: java, oracle, java8, loops
Published: 2021-04-08 10:41:12

HELLO My dazzling friends from the internet , todays lets start by thinking what is "Operators" or why not 'String' ? 
Lets see them one by one :D

#### Operator's 
Java divides the operator in the below parts 
=> Arithmetic Operators
=> Logical Operators 
=> Assignment operators 
=> Comparison operators 
=> Bitwise Operators

Arithmetic operators consist of '+','-','*','/',and Increment and decrement ++ and -- respectively and  % (modulo) .

Comparison operators consist of >,<, >= , <= , == , and != 

Logical operators consist of &&(and) ,||(or) , !(Not) 

Assignment operations are = , += , -= and many more  of this types .

#### String's In java :

Strings are used for storing text , it can be also said as the collection of words stored in double quote's

##### How to create a string variable 
```java
String name = "DELI" ;
```

Other string method's :
length()  ~ for example => name.length();
toUpperCase();
toLowerCase(); 

######Dribble 【 ͡❛ ͜ʖ ͡❛】 :
There are many more , but all are not of use and if they are in need they can be searched on the internet .

Now lets see some concatenation 

The + operator can be used between strings to combine them. This is called concatenation 
 for example ;
```java
String firstName = "Elon" ; 
String SecondName  = "Musk";

System.out.print("HEY MR "+ firstName + SecondName);
```
Output :
HEY MR Elon Musk 


Some More Dribble :\

Ever thought of Writing code this way :
```java
String var1 = "HEllo" ;
int var2 = "13 "
int var3 = var1 + var2    // output will be HEllo13 
```
HERe we conclude Strings 

Before we jump on the  Loops lets start with If and else condition's 

Think about what you like to eat between two things that you like  the most , you might be making decisions right ....ok cool forget food for a second If today rains i will be playing and if not i will play .....or there are tons of example , similarly in coding we have set of instruction that we need to select in cases of different context so we use if else or switch 

#####format of if else :
```java 
if (condion){
---------------
}
else{
--------------
}
```
#####Switch 

```java 
switch(expresion){
case 1 :
case 2 :
case 3 :
case 4 :
case 5 :
.
.
.
.
break ;
 default :
}
```

##### Default keyword :
The default keyword specifies some code to run if there is no case match :)

#### Break Keyword :
The break keyword specifies that whenever it is seen it stops the execution in the switch and hence the statement will be printed .
A break can save a lot of execution time because it "ignores" the execution of all the rest of the code in the switch block.

### Loop's

Loops are written to repeat the specific statements certain time until the condition are met .
Loops saves time , reduction of error and also can make the code DRY (do not repeat yourself)

There are three loops 
=> DO while 
=> While and 
=> for 

```java 
int i = 0;
while (i < 5) {
  System.out.println("HEY i Love to Read these JAva series ");
  i++;
}
```
Output :
HEY i Love to Read these JAva series
HEY i Love to Read these JAva series
HEY i Love to Read these JAva series
HEY i Love to Read these JAva series
HEY i Love to Read these JAva series

```java 
for(int j=0 ; j<5 ; j++){
System.out.println("HEY i Love to Read these JAva series ");
}
```
Output :
HEY i Love to Read these JAva series
HEY i Love to Read these JAva series
HEY i Love to Read these JAva series
HEY i Love to Read these JAva series
HEY i Love to Read these JAva series

####Let's conclude 
THis was the basics  of java  it has much things that can be learned in detail if one tries to try competitive coding and learn as much as they can as said learning never stops !