#6.2 Kotlin Tutorial for Android: FOR Loop Video Lecture | Kotlin Tutorial for Beginners: Learn Kotlin in easy language - Back-End Programming

hi registering Siddarth and welcome to
the next video of this cortland
programming series now this is the demo
video for the for loop while loop and
dowhile loop so let's check it out
inside the IntelliJ IDE so here inside
the IntelliJ IDE within the main
function let us try first the for loop
right so in case of for loop the syntax
is for followed by space bracket open
and bracket closed inside this I will
simply use the variable of I followed by
in operator followed by let us say let
us define the range let's say 1 dot dot
10 right and now inside the for loop I
will simply use the print statement
let's say print line and simply print
the value of I that range from 1 to 10
now this is the range that I have used
here and the concept of range I have
already discussed in the previous videos
so please check that out and now let us
run the code so here we go 1 2 3 4 5 6 7
8 9 10 we are simply printing the values
from 1 to 10 now suppose if I ask you to
write a program using the for loop to
print out all the even numbers starting
from 1 to 10 now inside this I will
simply write the if-else condition such
as if I modulus let's say 2 is equal to
equal to 0 then simply print out the
value of I right so let us now run the
code so here we go 2 4 6 8 and 10 so
here we have 5 even numbers
starting from 1 to 10 that falls between
1 to 10 right now this was all about the
for loop in case of Cortlandt now if you
are a beginner then you must continue
watching this video and if you already
know java and you already know how does
a for loop works then simply jump on to
the next video don't watch this video
just save your time right so all the
beginners please continue with this
video so how does a for loop in case of
caught link works now the for loop has
the initializer the in operator and then
we define the range right and then we
put our code here
now let us take some example here on the
left hand side suppose i have for i in
range of 1 2 3 and then here i simply
print hello right so what happens
exactly when these three lines of codes
are executed what happens is that in the
output we will get hello hello and hello
three times now this simply shows that
the print line method has been executed
three times that is loop 1 loop 2 and
loop 3 has been executed now after the
loop 3 the loop actually terminates
right and now here I have simply defined
some columns initialized condition check
code execute and increment so this is
the flow for the for loop right now when
the first loop is actually executed the
value of I is actually when and next
comes the condition check so when false
inside this range right 1 2 3 so the
condition becomes true right and then we
simply print hello with the help of this
statement and finally at the end of the
loop we simply increment the value of 1
internally and now the value of I
becomes 2 right and this value of 2
comes at the very initial point of the
second loop so in case of second loop
again we have the condition check 2
actually false inside this range so the
condition becomes true again and again
we print hello and finally at the end of
loop 2 we simply increment the value of
I and I becomes 3 and now this I equal
to 3 now again comes at the initial
point of or you can say the starting
point of loop 3 and again the condition
becomes true because this 3 is actually
present inside the range of 1 2 3 right
so again we print hello
and finally the value of I becomes 4 now
at the end of loop 3 when the value of I
becomes 4 this for try to initiate the
fourth loop which never happens because
this I will to for simply makes the
condition as false because the 4 does
not lie inside the range and finally the
loop terminates right so this is how the
for loop
the whole flow of the for loop is in
front of you you can again watch this
video if you are a beginner right and
then only proceed with the next video