Difference between revisions of "PHP-and-MySQL/C2/Switch-Statement/English-timed"

!Time

!Narration

|Hello and welcome to this PHP tutorial on the SWITCH statement.

|I'm going to show you a new exercise on this because its an important feature of PHP

|O0:13

|Let's create the syntax quickly

|The SWITCH statement is a substitute for the IF statement. Its a lot more neater and formattable choice although the input is an expression.

|So, now let's input the value of something  and then let's save the value equal to this

|Then we can execute the code if it equals or matches this value

|It's not a comparing technique. So, for comparing an IF statement for matching values and outputs that depend on the input, we're going to say SWITCH

|Let's start

|SWITCH is the basic code for it

|Let's put an expression in here, for example, I will say Alex here

|Let's create a mini program and I will explain it as we go

|Just like the IFstatement we will put curly brackets here

|Now let's look at the way to call each sort of check  

|We want to check the value here

|Now we will put this in quotation marks

|You can't even number obviously

|So what we type is - case - the value of the case that we want to match. For example- Alex

|Then we type a colon or a semi colon

|And then the condition if the case has matched with the SWITCH expression you have picked

|So, I will type - echo you have blue eyes

|To end our case comparison we're going to use break and a semi colon

|Remember that we've used the semi colon here but not here

|Now the second case. Lets see how to do it

|I'll type Billy and echo you have brown eyes

|Okay, and then break and semi-colon

|This is like an integrated IF. That is I could say - IF your name is Alex then echo you have blue eyes or ELSE IF your name is Billy you have brown eyes

|Probably for some people it's easy to do it this way. It's a lot more readable but it's a matter of choice

|Okay we got no more cases, I'm just going to use Alex and Billy for this example

|Here I will say default which will echo out - I don't know what color your eyes are

|Okay, we don't need a break after this because there are no more cases

|Obviously, there's no break after it cause there are no more options to chose from

|Okay, so, we've got our SWITCH here. Let's give it a go

|Now  I'm going to replace this ALEX here with a variable, to build our program

|So I'll type name equals, and I will let you decide that

|Then I'll say name, here

|So you see this is how we incorporate a variable here

|You should know how to do that by now

|So, let's start and see how this will work

|You'll say switch, you'll take this expression, which is equal to Alex

|Basically, this is the case which equals to Alex and it'll echo this.  The break is to end it

|If the name is say, Rahul, the default will echo - I don't know what colour your eyes are

|Okay, so let's try running this

|Just to revise

|We can see that Alex matches to Alex matches to the output

|What you can do is you can enter as many lines of code here as you like.  This break determines where the case ends

|An IF statement needs curly brackets to end a block

|However, here break determines the end of the block. These are called blocks, by the way.

|So, let's change this to Billy and let's see what happens

|You have brown eyes - exactly what we determined here

|Okay, now I'll change this to Kyle.....and refresh, I don't know what colour your eyes are, because there is no block that states Kyle's eye colour in our program feature

|So, that's basically the SWITCH statement

|Try it out. Some people don't like using it, some prefer using it

|It's probably much faster than the IF statement. It's easier to control.  It looks a lot better.  So really its up to your personal choice