Python 3 Programming Tutorial: If Statement

The if statement is one of the most basic forms of logic that can be introduced into your program. The idea of the if statement is to assess whether something is the case, and, if it is, then to perform the following block of code within the statement.

In this tutorial you are shown how to use the if statement in python 3.3.

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[nutblunt]

thank you, my professor is useless since we have to do everything online and he doesnt respond

[Sohasorouri]

Thank youuuu!!!
I was trying to learn this from a kids book and got super confused with what the author was trying to say 😂
This explanation made it sound so easy XD

[twelfydelfy]

i am watching this in 2020 and my first code is
print("u are very useful unlike other yolutubers who bullshit")

[extro]

print ("You are the best sentdex")

[apriltost]

Coffee = 2
milk = 8
sugar = 0

if Coffee > milk:
print ('too much coffee!')

if sugar > 0:
print ("Oh no! it's

if Coffee == milk:
print ("OOH that's a strong coffee..")

[djleisheng]

You can also use negative statements like:

x = 3
y = 5

if not x == y:
print('x is not equal to y')

if not y < x:
print('y is greater than x')

I wouldn't recommend doing like that second example though as it is confusing. But just so you know, it's possible.

[amjad.m]

while 1==1:
print("i love you Sentdex")

[stephaniekimbrough]

Thank you. I needed an If conditional without the else to teach children i.e. chunk the lesson.

[arrowsverse]

wow takes me a couple lessons foor the teacher to finish one of these but for youit takes about less than 10 minutes although i learn with 15 mins at school.
Yours is so much easier to understand. I might be saying that cause im a fastlearner but it is the truth.

[BraydenDarrell]

I figured out if statements on my own, but then I tried using multiple if statements. I ran into some problems.

[YURTZYN]

Can you make an if statement check if a given input is an integer or not?

[defendersart]

skipcount = -1
song = ['always', 'look', 'on', 'the', 'bright', 'side', 'of', 'life']

for sing in song:
if sing == 'look' and skipcount <= 0:
print (sing)
skipcount = 3
elif skipcount > 0: skipcount = skipcount - 1
continue
elif skipcount == 0:
print ('a' + sing)
skipcount = skipcount - 1
else:
print (sing)

output:

always
look
aside
of
life

#My Ques: How does it count to 3 or 0 in order to print look and aside? from which direction?

[bradyhuang]

Wow, this is so handy and helpful with the operand statement!!
Learn for a while but figure out now!!

[truthseeker]

plenty example very simple and plain english ! weldone mate keep it up and upload more.

[sqlicto]

i can't figure this out when variables are text, the compiler is not understanding the if statement at all.

[spearius]

Thanks, man. I'm hear for the same reason that "no" stated.

[vace]

can anyone please help me whats wrong in this code:

first = input("Enter the first no.")
if first == type(str):
print("Enter a valid no.")

after putting string or integer the program gets ended

[victorvictus]

Hi @sentdex I have an issue and I'd love if you could help me. I have a variable called name and two variables called is_male and is_female. The If statement works perfectly (if is_male and not (is_female):) and basically asks you for an input which is a name you want to name the program like. So I want to make the program print something else if the user types a name (This name being Connor, sort of an Easter egg). How could I do this? Also, if you're interested, I can send you a screenshot if you give me your discord or something like that, thank you!

[suchanakamil]

I was not understanding this as my teacher taught me thank you so

[EvdeKsp]

Hi sentdex, i still have a question:
What if i wanted to put more than 1 statements into a single one like this: "if z == 10, x == 9:"
Because i tried this and it didnt work (the problem is with the comma i believe)
So what should i do?

Thanks in advance