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Mariya Shklyar
1,022 PointsHow to practice functions?
I want to practice writing functions. Where can I find some examples with answers? It seems that I understand the video, but when I want to practice in workspace, I don't have anyidea how to begin. That means that I don't undestand the concept. But I don't even know what I don't understand.
1 Answer
Andreas cormack
Python Web Development Techdegree Graduate 33,011 PointsHi Mariya
In programming you should always follow the rule DRY or don't repeat yourself. That's where functions come in. Imagine your trying to write code that adds 2 numbers. See below
# someone asks you to write code to add 2 numbers 10 and 20 and print it. You do the following below.
a = 10
b= 20
print(a+b)
# another person then asks you to do the same but says, i now need you to add 30 and 50.You do the following below.
a = 30
b= 50
print(a+b)
# as you can see you are now repeating code.
# On the other hand if you make a function called add that takes to arguments it would be more efficient. See below
def add(num1,num2):
print(num1 + num2)
# now when you need to add two numbers all you need to do is call the add function.
add(10,20)
add(30,50)
you can also practice writing functions at http://codingbat.com/python
hope this helps