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Perl Tutorial - 34 Infinite Loop Video Lecture - Perl Building Blocks An
Text Transcript from Video
hello guys welcome to my channel this is
the 34th tutorial in this course and
this is also going to be the shortest
video in this course because what we
have to talk about is infinite loop and
I have a really simple script opened up
here it's called four five lines of code
and in the script on line number three
I've created a scalar variable a which
has the value five and then I have a
while loop on line number five and the
test condition is a is less than ten and
then inside the body of the while loop I
have a print statement that is going to
display the text value of a is and then
it's going to show the value of a right
everything seems fine except the fact
that this loop does not have an update
statement so the value of a is always
going to remain five and this test
condition would always value to true and
this print statement would keep on
executing and that is why such loops are
known as infinite loops because they
would run forever and you know if you
want to stop this loop from executing
that we first run this script and show
you the output so there you go you see
that in the output window you I have a
bunch of statements value of a is five
and you know the output is just
refreshing every second you know maybe
almost every femtosecond and I'm getting
new statements which are displaying the
same text value of a is five now if you
want to stop the execution of such a
loop then what you have to do is press
the key combination ctrl C after of
course clicking on the window and when
you do that it tells you terminating on
signal sig end or something and you know
it finally displays the value of a is
five one last time and then of course
you can press any key to close this
window so you know that is what an
infinite loop is and you know this is
more so for the purpose of cracking
interviews I mean people could ask you
generally to test your knowledge what is
an infinite loop so you should know that
an infinite loop is a loop which does
not have an update statement
and also an infinite loop is a loop that
would keep on running till you interrupt
the execution of the program through
some key combination in case of Perl and
Padre IDE that key combination is ctrl C
so that's it for this tutorial I hope
you guys had fun watching this one you
may subscribe to my channel if you
haven't already I'm going to see you in
the next video till then take care
the 34th tutorial in this course and
this is also going to be the shortest
video in this course because what we
have to talk about is infinite loop and
I have a really simple script opened up
here it's called four five lines of code
and in the script on line number three
I've created a scalar variable a which
has the value five and then I have a
while loop on line number five and the
test condition is a is less than ten and
then inside the body of the while loop I
have a print statement that is going to
display the text value of a is and then
it's going to show the value of a right
everything seems fine except the fact
that this loop does not have an update
statement so the value of a is always
going to remain five and this test
condition would always value to true and
this print statement would keep on
executing and that is why such loops are
known as infinite loops because they
would run forever and you know if you
want to stop this loop from executing
that we first run this script and show
you the output so there you go you see
that in the output window you I have a
bunch of statements value of a is five
and you know the output is just
refreshing every second you know maybe
almost every femtosecond and I'm getting
new statements which are displaying the
same text value of a is five now if you
want to stop the execution of such a
loop then what you have to do is press
the key combination ctrl C after of
course clicking on the window and when
you do that it tells you terminating on
signal sig end or something and you know
it finally displays the value of a is
five one last time and then of course
you can press any key to close this
window so you know that is what an
infinite loop is and you know this is
more so for the purpose of cracking
interviews I mean people could ask you
generally to test your knowledge what is
an infinite loop so you should know that
an infinite loop is a loop which does
not have an update statement
and also an infinite loop is a loop that
would keep on running till you interrupt
the execution of the program through
some key combination in case of Perl and
Padre IDE that key combination is ctrl C
so that's it for this tutorial I hope
you guys had fun watching this one you
may subscribe to my channel if you
haven't already I'm going to see you in
the next video till then take care
About this Video
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Apr 29, 2026 Last updated
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