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Sage Range function

asked 2017-09-17 12:49:48 -0600

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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 gravatar imagedan_fulea ( 2017-09-17 13:06:12 -0600 )edit

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

Manoj gravatar imageManoj ( 2017-09-17 13:28:54 -0600 )edit

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answered 2017-09-17 14:16:57 -0600

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 gravatar imagemforets ( 2017-09-17 14:19:03 -0600 )edit

Thanks....

Manoj gravatar imageManoj ( 2017-09-17 14:37:07 -0600 )edit
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answered 2017-09-17 14:16:13 -0600

mforets gravatar image

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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Asked: 2017-09-17 12:49:48 -0600

Seen: 66 times

Last updated: Sep 17