Lets break this code in small parts and understand it..
total = 0
for n in numbers:
if n < 10:
total = total + 1
Explanation of above code...
1. We've defined a function count_small that takes list as parameter (i.e is numbers)
2.We've defined a local variable
total that is set to 0.
3. We started looping over our list numbers using iteration variable n.
4. Inside the loop...
A. if a number is less than 10 then add 1 to total, keep doing this until loop iteration gets finished.
5. return the total (which will return total count of numbers that're less than 10)
So our function takes a list and counts all the numbers less than 10 and gives us count of numbers that are less than 10.
lost = [4, 8, 15, 16, 23, 42]
small = count_small(lost)
1.We've defined a list named lost .
2.we called (calling the function) count_small function and give it list lost as argument. It will return total count of numbers less than 10 and we save it in variable
3.We print this value, that is 2.