Conditionals |Section 3|Celestial Warrior

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Hey, hello again. In this lecture you're going to learn

about conditionals. What is a conditional?

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Well a conditional is a block of code which

performs different actions depending on

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whether a given conditional evaluates to

true or false so let's go ahead and

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create a conditional in Python. I'll create the

file conditionals dot py and let me

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create a conditional block, and first of

all let me create a variable. Let's say a

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equals five and here I'll create a

conditional block. This block, what this

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will do is it will perform an action if

a is less than five and another action

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if a is equal or greater than five

so let me create that. If this, our

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conditional starts if a and let's say

less than five print, let's say less than 5.

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Press ENTER and if you want to perform

more actions with this conditional, with

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this condition so when this condition is

true this will be executed but if you

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want to perform more actions you can add

one there, if not then you can go to the

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next check.

So that would be else, so you have a

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column here, a column there, so else print

equal or greater than 5. Now let me

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execute it. And we get equal or greater

than 5. So why did you get that? Well

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because you know if a is less than 5

which is not, so this evaluates to false,

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that means with this this will not be

executed so Python will skip this line

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and it will go to the next one. This next

line says else, so else means if this

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is not true,

this will be executed, so equal or

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greater than five, so in this case if a

is not less than five then there's no

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other option but a is either equal or

greater than five, so that's an if and else

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conditional block. However if you want to

add more conditions there

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you want to use elif, so let's do that

the first two lines stay the same. If a

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is less than five print less than five

elif a is equal to five print equal to

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five else print greater than five. Save

and execute and you get equal to five.

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If a was six,

you'd get greater than five and if a was

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three you'd get less than five.

That's a conditional block in Python and

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yeah, try to get familiar with the syntax

and in the next lecture I'm going to

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incorporate a conditional with this

block of code, so see you there.

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