How to express javascript array subscript

In JavaScript, an array subscript is an integer index starting from 0 and used to access elements in the array. Array subscripts can be represented using square bracket notation.

For example, suppose we create an array and assign the value:

let fruits = ['apple', 'banana', 'orange', 'grape'];

We can access a specific element by using the index of the array. For example, to access the first element in the array (i.e. "apple"), we can use index 0 as shown below:

console.log(fruits[0]); // 输出 "apple"

The same method can be used to access other elements. For example, to access the third element in the array (i.e. "orange"), we can use index 2 as shown below:

console.log(fruits[2]); // 输出 "orange"

In JavaScript, arrays can also be iterated using a for loop. We can use the length property of the array to determine the conditions for the iteration to terminate, as follows:

for (let i = 0; i < fruits.length; i++) {
  console.log(fruits[i]);
}

This will output the elements in the array one by one:

apple
banana
orange
grape

In short, array subscripts are used in JavaScript For accessing elements in an array, square brackets are used, starting from 0 and ending with the array length - 1.

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