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This is a really late reply but I was struggling with that exact problem and maybe its useful for someone else.
The {} define a set, a group of unique elements. So if we, for example, define {1, 4, 1, 2, 2, 3, 2, 1} we will get {1, 2, 3, 4} as a result.
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You are viewing a single comment's thread. Return to all comments →
This is a really late reply but I was struggling with that exact problem and maybe its useful for someone else.
The {} define a set, a group of unique elements. So if we, for example, define {1, 4, 1, 2, 2, 3, 2, 1} we will get {1, 2, 3, 4} as a result.
This link has more details.