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Home/ Questions/Q 1081729
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Editorial Team
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Editorial Team
Asked: May 16, 20262026-05-16T22:12:20+00:00 2026-05-16T22:12:20+00:00

This might be a strange question but if I want to define a list

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This might be a strange question but if I want to define a list of integers from:

1, 2, 3, 4, 5, 6, 7, 8, 9

Do I need to do it using the ; character?

[ 1; 2; 3; 4; 5; 6; 7; 8; 9 ]

instead of?:

[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ]

It just seems to me , is more natural and easy on the eyes. Just wondering the idea behind using ;? (Not criticizing)

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  1. Editorial Team
    Editorial Team
    2026-05-16T22:12:21+00:00Added an answer on May 16, 2026 at 10:12 pm

    Yes you must. The reason why is that in F# the comma operator is used for tuple expressions. So the expression 1,2,...9 is interpreted as a single tuple with 9 values.

    [1,2] // List with 1 element that is a tuple value - (int*int) list
    [1;2] // List with 2 elements that are integer values - int list
    
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