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Parentheses [and] are often used in the range represented by mathematical sets! What is the difference between them and what does it mean?
Meaning of difference: [means including that point,] means not including that point.

Examples are as follows:

For example, 2≤x≤5 can be expressed as [2,5]

2 ≤ x < 5 can be expressed as: [2≤x