Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial
mohan Abdul
Courses Plus Student 1,453 Pointshow comes this code only iterates 9 times?
how comes this code only iterates 9 times?
for i in range(1, 10, 1):
print(i)
mohan Abdul
Courses Plus Student 1,453 PointsThanaphon Chavengsaksongkram, so regardless of the start number, the iteration always starts at 0?
Thanaphon Chavengsaksongkram
Front End Web Development Techdegree Graduate 13,464 PointsNo, if you specify the start argument, it will start at the given number. Otherwise, it will start at zero. However, it will always end 1 before the end parameter.
mohan Abdul
Courses Plus Student 1,453 PointsThanaphon Chavengsaksongkram, Thanks for the speedy reply, unfortunately it wont let me give positive mark or best answer. Are you sure you are replying in the answer box?
1 Answer
Steven Parker
231,275 PointsThe "stop" argument of a range is not the last value, but the limit value. For a positive "step", the contents of a range r are determined by the formula r[i] = start + step*i where i >= 0 and r[i] < stop. Notice that comparison is less than (not "less than or equal").
For more details, see the chapter on ranges in the Python documentation.
Thanaphon Chavengsaksongkram
Front End Web Development Techdegree Graduate 13,464 PointsThanaphon Chavengsaksongkram
Front End Web Development Techdegree Graduate 13,464 Pointsrange function generates a list from start to end -1. The default start is 0.
range(5) = [0,1,2,3,4] <--- You get 5 iterations since it start from 0 range(1,5) = [1,2,3,4] <--- You only get 4 iterations since it start from 1