Sage Range function

range

asked 2017-09-17 19:49:48 +0100

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I use sage range function to print numbers form 1 to say 10 using print [1..10]. How to print only even numbers using this?

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Is the following ok?

sage: print range(2,11,2)
[2, 4, 6, 8, 10]

dan_fulea ( 2017-09-17 20:06:12 +0100 )edit

I knew that. I was wondering if same can be done with [1..10]?

Manoj ( 2017-09-17 20:28:54 +0100 )edit

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answered 2017-09-17 21:16:57 +0100

slelievre
17684 ●22 ●160 ●349 http://carva.org/samue...

The ellipsis operator looks at the previous two numbers to guess the step.

sage: [2, 4 .. 10]
[2, 4, 6, 8, 10]

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wow, i didn't know that works!

mforets ( 2017-09-17 21:19:03 +0100 )edit

Thanks....

Manoj ( 2017-09-17 21:37:07 +0100 )edit

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answered 2017-09-17 21:16:13 +0100

mforets
1413 ●9 ●27 ●44 http://marcelo-forets.fr/

using list comprehension:

sage: [i for i in [1..10] if i%2==0]
[2, 4, 6, 8, 10]

see more alternatives in the Programming in Python and Sage Thematic Tutorial.

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