Comparison Operators Video Lecture | PHP for beginners - Software Development

hello YouTube I'm welcome to tutorial
number 11 in the PHP programming series
and in this video we will look at the
comparison operators so we're going to
use variables and if statements that
we've covered in previous tutorials so
if you don't know what a variable or if
statement is you need to go back and
watch them first okay so we can begin
we're going to make our PHP file and you
know as always we'll make our starting
and ending tags we'll save this as
compare dot PHP and we're going to use
comparison operators now comparison
operators are a way for you to compare
things numerically or you can also
compare strings with some operators and
it will basically allow you to just make
a decision based on the value of
something so we're going to collect
numbers we're going to num1 and that's
going to equal 10 that's sorry 10 and
num2 let's put this num1 num2 is going
to equal 20 okay so now we're going to
make if statements we're going to say if
num1
oops if num1 equals equals 210 and you
know how we do if statements have our
curly brackets go into echo number is 10
okay and I'll just use channel quotes
actually it's quite a habit using double
quotes because I have other languages
but we'll save compared at PHP and I'll
say number is 10 and you may not know it
already but you've already used a
comparison operator and is the equals
equals the equals equals comparison
operator it compares this with this and
it says if it's equal to look so like
deadly equal to and 10 is equal to 10
obviously but what if you wanted to test
if no one was greater than 10 we can use
if num1 is greater than 10 and we'll
also embed an else statement here so
going to say if no one is greater than
10 then
[Music]
number is greater than 10
I'm have an else statement and say echo
number is not greater than 10 and we'll
close that so we'll save it and there's
a past error let me see what I've done
wrong and it is on line 9 and they got
off missed out the semicolons and so I'm
really tired right now hope not long ago
so if I save that my mistake and also a
number 1 is not greater than 10 that's
because number 10 it is 10 so we go
through this number 10 number 1 is 10
and it says if and the condition is if
no one is greater than 10 and number 10
is not greater than 10 so it's going to
skip this and go to the else so let's
look at some other comparison operators
we also have the less than so we can
actually first I'm just going to show
you we'll just use two variables here to
make it more interesting
so we'll just change this to num2 so if
num1 10 is greater than in on to number
1 is greater than number 2 and then here
if number 1 is not greater number 2
number 2 is greater than number 1 so we
can just refresh this and number 2 is
not greater than number 1 so let's look
at some other comparison operators and
if we we can have the less than operator
so if number 1 is less than number 2 I'm
gonna have our curly brackets echo
number 1 is less than number 2 and we'll
save that and the condition is true
because number 1 is less than number 2
and another one that we can do is
greater than or equal to so we'll we'll
test this out
with an actual number so we're going to
do if number one is greater than or
equal to so we do this by doing greater
than sign and then equal right after
they're almost great so evil - done ten
then we are going to execute this code
that go number one is greater or equal
to ten
and I'll keep doing the double coats
I'll stick with single codes from now on
well refresh number one is greater than
or equal to ten
I make it also works the same way with
less than or equal to you just exchange
that or less than or equal to and it
works the same way now what we're going
to look at now the final comparison
operator is not equal to so all you do
for that is you know that if you want to
compare something we'll say if and I
will change number two to ten we'll say
if and we'll have our brackets if number
one and double equals and num2 then
we're going to output this we're going
to echo and they are equal and we'll say
that to see if it works there are equal
as they're both ten but the way to see
if something is not equal to is to use
an exclamation mark and that will say if
it is not equal to so this exclamation
mark pretty much means not so if it's
not equal to number two then it's not
it's going to output they are not equal
so fresh that and that is not output
again thing because they are they're
equal so this condition is false so we
change this to 11 and save it and you'll
see they are not equal don't know why
chrome keeps doing that but that was the
tutorial on comparison operators and
solve to summarize I'll just comment
them here in the check if something is
equal to something we use that double
equals so that will save them
something's equal um if you want to
check if something is greater than will
use the shift
and then . to see it's great sit down
and check if something is less done it's
the less done and then greater than
equals to is that and you guessed it
less than equals to is the less sound
than equals to and then finally the one
the last one we land is not equal to
which F Carnation mark and equals so you
can use these in if statements to four
conditions to make them a lot more
flexible so you don't have to do
multiple if statements to find one thing
and yep that is the sure this is close
that that is the end of the tutorial
and thank you for watching if you have
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