List ↔ Array with sequence of same Type elements & variable length
[<span data-tooltip-id="preview__EhK7Xq5sy8rkvA3aM">`Array`</span>](array_base-type) [<span data-tooltip-id="preview__Fe68cBJSdzWr8htsF">List</span>](list) [<span data-tooltip-id="preview__qmjwwmTaiQHNWYrDv">Type Expression</span>](type-expression)
`let arr1: `number[]` = [1,2,3];`
[<span data-tooltip-id="preview__EhK7Xq5sy8rkvA3aM">`Array`</span>](array_base-type) [<span data-tooltip-id="preview__Fe68cBJSdzWr8htsF">List</span>](list) [<span data-tooltip-id="preview__qmjwwmTaiQHNWYrDv">Type Expression</span>](type-expression) via [<span data-tooltip-id="preview__Rzcua4qui8DqHjpEm">Angle Bracket Notation</span>](angle-bracket-notation)
`let arr2: `Array<number\>` = [1,2,3];`
number[] is Syntactic Sugar for Array<number\>