1let array = [11, 12, 13, 14, 15];  
2console.log(array.length); // 5  
3
4array.length = 3;  
5console.log(array.length); // 3  
6console.log(array); // [11,12,13]
7
8array.length = 0;  
9console.log(array.length); // 0  
10console.log(array); // []