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let arr0 = ["swift", "c", "c++", "c#"] let arr1 = ["php", "java", "python"] let arr2 = ["ruby", "cobol"] var arr = [arr0, arr1, arr2] print(arr) /* run: [["swift", "c", "c++", "c#"], ["php", "java", "python"], ["ruby", "cobol"]] */