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Start your free trialJamshaid Ali
189 PointsCan someone please help me, im trying to understand what += does in this code
can someone please help me with this question im trying to understand what the += is used for.
https://teamtreehouse.com/library/strings-and-operators
snacks = "cake" + " and custard"
snacks = snacks + " and tea"
snacks += ", lovley"
snacks
'cake and custard and tea, lovley'
5 Answers
Jennifer Nordell
Treehouse TeacherHi there, Jamshaid Ali! The +=
is really just a shorthand. It means, take the value that was in this variable, add something to it and reassign it back into that variable. The result is cumulative.
greeting = "Hi"
greeting += " there, Jamshaid"
greeting += "!"
print(greeting)
This will print out "Hi there, Jamshaid!"
. Each time we use the += we're taking the original value and adding on a new string to the end. But you could also write this out the long way:
greeting = "Hi"
greeting = greeting + " there, Jamshaid"
greeting = greeting + "!"
print(greeting)
This would give you the same results. Take the original value. Add something to it and assign the result back into the variable overwriting the original value with the cumulative value.
Hope this helps!
shriram sethi
Python Development Techdegree Student 191 Pointslet's say
a = 2
a=a+3 -------The value of a will be equals to 5.
instead of writing a=a+3, we can also write a+=3. The result will be the same.
Jamshaid Ali
189 Pointsok thank you
Ryan Caalim
261 PointsThank you for breaking it down. I understand it now too
Anders Beutler
Courses Plus Student 606 Pointsanother way to see it... think of the " + " in the equation there would be considered you adding another string to the pre-existing string. Then the " = " would be considered you applying both together. So essentially, "dessert += "!" * 20" really just means "add (whatever dessert was for you) the dessert string to this new one, "!", and apply them together. equaling (my dessert)... Strawberries and Bananas and Ice Cream, yum!!!!!!!!!!!!!!!!!!!! .