#6 Data types in Java

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In this lecture we are discussing
1) datatypes for given variable
a)Types of data-types?
b)primitive data types
c)why do we need different type of integer type?
d)how to create variable of different data types?
2) range and way to declare different data variable
#1
a) Datatypes are categories into primitive and non-primitive datatype.
But in this lecture, we are take all concept upon primitive data type.
b) There are 8 primitive datatype
integer ---byte, short, int, long
float --- float , double
character ---char
boolean --- boolean
c) why do we need different type of integer ?
= there are range for each type. for int --4 bytes ,long --8 bytes, short --2bytes byte --1byte
d) How to create variable of different data type?
= int a=10; byte b=4
= dataType variableName = value;
integer variable declaration
int a=5;
long b=600l; // e.g 578l, 100000l represent long integer type
byte c=127;
short s=128;
float vs double
=double have more precision than float by default java support double.
=declare variable of float and double type
--double a=5.6;
--but float b=5.6; //give error
--correct way float b=5.6f;
character representation
= char ch='a'; //using single quotes on character we can declare char type of variable
boolean representation of variable
= boolean result=true; there are only two value of boolean either true or false.
=In other language like c and c++ -- 0 is treated as false and non zero number treated as true but it is not in java.
{byte, short, int, long, float, double, char, Boolean }
since java is statically type or say strongly type language therefore we need
to mention datatype for each variable for declaring variable.
e.g int i=5; float f=2.5f;
In java integer are by default for integer int type;
for real number by default double
#2
Range and way to declare different data type variable
int i=5;// 4 bytes ---32 bytes -- -2147483648 to 2147483647
short s=5;//2 bytes -- 16 bytes -- -32768 to 32767
byte b=5;//1 byte -- 8 bytes -- -128 to 127
long l=5;//8 bytes -- 64 bytes -- -9223372036854775808 to 9223372036854775807
float f=5.5f;//4 bytes -- 32 bytes -- 1.4e-45 to 3.4028235e+38
double d=5.5;//8 bytes -- 64 bytes -- 4.9e-324 to 1.7976931348623157e+308
char c='a';//2 bytes -- 16 bytes -- 0 to 65535
boolean check=true; //value is either true or false
ASCII - American Standard Code for Information Interchange
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[@RaunakKumar-vc5ji]

sir where were u......got a diamond in search of gold♥

[@devanshusachdev7367]

Whoa! so much information in such a small video. Here are the points which I liked the most:
1. Real values are treated as double by default. We have to explicitly specify float value.
(Ex.: double d = 5.6 --> no error ; float f = 5.6 --> error)
2. Only 'true' and 'false' are treated as boolean.
(Ex.: if(true) --> no error ; if(1) --> error)
Thanks Navin for the info :)

[@freddieromero3942]

Why does the mac allow the float f = 5.6 and windows only accepts float = 5.6? I can not find this on Google and this course is hard to follow when I am playing follow the leader to a T.

[@ashishtayade047]

Thank you sir very nice gide & very nice best java in data type teaching information video..👍

[@Flo-mz8ct]

Thanks a lot! I will watch whole series to refresh my java skills :D

[@zikki8044]

thank you so much sir...superb explanation..

[@user-qv9lh1bs4h]

Thanks ,great explanation in detail and in a simple way to understand

[@deviprasadgm]

Thank you Sir...............Excellent Explanation

[@Ecto993]

really helpful, thanks !

[@user-op6xr2di2e]

Thank You Sir ❤

[@rupaliminati8356]

quality content 🙌

[@LO3.]

GOOD EXPLATIONS

[@user-gd4in5pg8o]

Thank you

[@rojalindhar899]

It's vry helpful👍💯

[@arthdaware05]

Keypoints:
1. default: double (8bytes) not float
2. char datatype: only one character and single quotes are allowed
3. write f at the end of float, l at the end of long
4. byte range: [-128 , 127]

[@abinayas6221]

when ur printing input output is not print syout how u get output

[@user-gd4in5pg8o]

May you please make a video series on making a 3d Game Engine with Java
Please update when you do

[@SP-un3rj]

Thank you sir Please Try To upload Servlet, JSP And Spring Videos Also In 2023

[@mohammadaboonajmi2927]

Hi do you have C# tutorial?

[@HarshPatel-so7gl]

why can you put only one character/letter/number in the char variable?

[@deepanshusahu2333]

Sir i have one question if u all the content of topic is covered in such a small times

[@theamritjha755]

Sir ek baar main hi sare video daal diye aapne 😅

[@Magicpeach01]

Im getting error constantly says
Could not find pr load main class Hello
Class not found what should i do??

[@actandrepeat]

Sick series to watch in 2023^

[@AnuragRawat01]

What do u mean?

[@vanajavanaja6639]

​@@AnuragRawat01aq
Lq

[@4nsaririzz149]

I am first viewer on this video

[@siddamallayyahiremath6707]

i am searching for advanced java can u help me??

[@akvloggsofficial]

Awesome

[@martinamillo969]

I wrote this code and cant get what is wrong with it
class Hello
{
public static void main(String a[])
{
Char c = ‘k’;
System.out.print(c);
}
}
when i compile it , it shows these errors
Hello.java:5: error: illegal character: '\u00b4'
Char c = ┬┤k┬┤;
^
Hello.java:5: error: illegal character: '\u00b4'
Char c = ┬┤k┬┤;
^
Hello.java:5: error: not a statement
Char c = ┬┤k┬┤;
^
3 errors
How to resolve?

[@mayankraj4763]

C of char should be small, not capital

[@bethesuper4500]

it is System.out.println, not print

[@HarshPatel-so7gl]

@@bethesuper4500 println just means print on new line, so that isn't major issue. but it is easier with println.

[@Magicpeach01]

Same I'm getting continuous errors don't know why 😢😢😢

[@AntarikshRajkonwar]

12/5/24

[@kittu0132]

what you are typing to compile in terminal . i'm not getting you there

[@notshubhm]

First he types "javac" to compile the problem and if the program is compiled successfully without any errors then he types the program name. For example "Hello".

[@yeswanthkumarnelli2099]

Here is a total code
class Hello{
public static void main(String args[]){
char c = 'k';
System.out.print(c);
}
}
After you write this
Do this in your Terminal
javac Hello.java
java Hello
Then your output will come.

[@razakshaik5751]

where is reference data types

[@sreesanth20]

class Hello
{
public static void main(String a[])
{
System.out.println(3 + 5);
}
}
for this code i get this "Hello world"

[@sa_____i149]

You have to run the code first then you will get the result