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This article introduces the knowledge of "how to create an empty array with JavaScript". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

JavaScript to create an empty array method: 1, the use of array direct quantity "[]", syntax "var array name = [];"; 2, the use of Array () function, syntax "var array name = new Array ();" or "var array name = new Array (array length value);"

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

Method 1: use the array to directly measure "[]"

Syntax format for array literals: contains multiple lists of values in square brackets, separated by commas.

Var array name = [values list]

If the values list is empty, you can create an empty array.

Var arr = []; / / empty array console.log (arr)

Method 2: using the Array () function

When you use the new operator to call a function of type Array (), you can construct a new array.

Var array name = new Array (values list)

Similarly, if the values list is empty, you can create an empty array.

Var arr = new Array (); console.log (arr)

If you pass a numeric parameter to Array (), the parameter value is equal to the attribute value of the array length, and you can define the length of the array, that is, the number of elements contained.

Var arr = new Array (5); / / an empty array of specified length console.log (arr)

This is the end of "how to create an empty array with JavaScript". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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