1.1 Functions¶
Our first function: print()¶
Watch this video from 2:28 to 3:35
# To load the video, execute this cell by pressing shift + enter
from IPython.display import YouTubeVideo
from datetime import timedelta
start=int(timedelta(hours=0, minutes=2, seconds=28).total_seconds())
end=int(timedelta(hours=0, minutes=3, seconds=35).total_seconds())
YouTubeVideo("4XIllJVnT4Y",start=start,end=end,width=640,height=360)
The following is a transcript of the video.
💡 Remember: In the previous notebook you created a variable called
genus. Create the variablegenusagain in the cell below to complete this lesson.
# Create the variable genus
genus = "Vitis"
You can also get the value back of a variable using a function. So let’s go over our very first function, the simplest which is print(). A function in Python has a name
like print and it has a set of parentheses. You put an input inside the parentheses and
the function processes the input to produce an output. So for example, the output of
the print() function is to simply print out the value of our variable. So if we
print genus what we get back is "Vitis".
# You can use the print() function to see a variable value
# A function always has a set of parentheses
# You place the input inside the parentheses
# The function processes the input to produce an output
# The output of the print() function is to print out our variable
print(genus)
Vitis
You can use commas to separate print outputs by a space and both variables and strings can be used with the print function. So for example, in our print function if we put a string in quotation marks "The variable genus is equal to" and then we put a comma and then we put our variable genus, if we execute the print function what we get is The variable genus is equal to Vitis.
# Use commas to separate print() outputs by a space
# Both variables and strings can be used with print()
print("The variable genus is equal to", genus)
The variable genus is equal to Vitis