#4.3 Kotlin Data Types: VAR vs VAL: Variables and Constants DEMO Part-2 Video Lecture | Kotlin Tutorial for Beginners: Learn Kotlin in easy language - Back-End Programming

hi registering for the earth and welcome
to the next video of the Scotland
programming series now in this video let
us check out the demo for the data types
in Java now to define any variable we
need to use the keyword of their space
give it the name as such as name equal
to let's say Henry now here we have
defined the van a meek hwal to Henry
now suppose later I want to change the
name from Henry to let's say Kevin so
here what I can do I can simply use name
equal to Kevin so I have simply
reassigned the value of name from Henry
to Kevin now if you print this variable
in the output you will get Kevin as the
output now suppose if I change this
where' to let's say V Al well then here
the intelligence IDE will simply show
some error the Val value cannot be
reassigned which means the valley name
is actually immutable in nature so once
you have defined the value of name as
Henry you cannot change it later on
right so this is the difference between
Val and where in case of Courtland and
now by default this name has actually
got the properties of a string because
here on the right hand side we are using
the string value now if you want to
define explicitly what this name
variable stands for so here you can
simply use colon space string and now
definitely this name becomes string
earlier it was string now you're sure
that this name variable can only contain
the value of string now what is the
benefit of using colon space string why
don't we simply use name equal to Henry
now the reason is that suppose if I
remove Henry from here then it will
simply throw some error because the
intelligence IDE don't know what this
name stands for what is it all about
so here I will simply tell the compiler
that this name is actually of the type
of string and later on I will simply
initialize the value to Kevin so this is
the advantage of declaring the datatype
explicitly here
if you remove it then the code will not
work and now apart from string we have
other data types as well such as
in boolean float double and care now
here I have simply defined where H equal
to 10 is alive it is true marks equal to
ninety seven point four percentage
ninety point something value gender is
male now these are the various data
types in case of caught length now here
in case of load it is showing some error
because by default this ninety seven
point four is actually a double value so
we have to make compiler know that this
value is actually of the type of float
so for that we have to use either small
F or the capital F it is totally up to
your choice now here in case of double
small D or capital D I guess in case of
Cortland small D and capital D does not
work because by default it is double in
nature so for the fluid value you have
to define small F or capital F
explicitly now one more thing here to
note is that all these variables such as
age is a life marks etc are actually
objects in Cortland so always remember
everything in Cortland is actually a
object right so you can treat everything
here as object you can also make it out
with the help of this I which is capital
B which is capital all these actually
represent one class and now this age can
also be initialized by using where my
age equal to 10 which is the inline
initialization without using the colon
and int datatype here now same thing
applies to other ones as well and now to
print this value you can simply use the
print method and simply pass in let's
say is alive
or let's say gender or let's say marks
and so on this will simply print the
values so this is all about the basic
datatypes in Cortland so the codes are
pretty simple compared to Java right