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The length property sets or returns the number of elements in an array. Syntax. Return the length of an array: array.length. Set the length of an array: array.length = number. Return Value. Array Tutorials: Array Const. Basic Array Methods. Array Search Methods. Array Sort Methods. Array Iteration Methods. Browser Support.
- JS Arrays
The length property of an array returns the length of an...
- JS Arrays
Only arrays have a length property: var testvar = [ ]; testvar[1] = 2; testvar[2] = 3; alert(testvar.length); // 3. Note that Javascript arrays are indexed starting at 0 and are not necessarily sparse (hence why the result is 3 and not 2 -- see this answer for an explanation of when the array will be sparse and when it won't).
12 wrz 2023 · Learn how to use the length property of an array to get or set the number of elements in it. See examples, specifications, browser compatibility and related links.
The length property of an array returns the length of an array (the number of array elements).
1 lut 2024 · Learn how to use the length property and a for loop to get the number of elements in an array in JavaScript. See examples, explanations and tips for working with arrays of different sizes and types.
Learn how to use the length property of an array to get or change the number of elements in a dense or sparse array. See code examples and explanations of how the length property works.
26 wrz 2024 · Relationship between length and numerical properties. A JavaScript array's length property and numerical properties are connected. Several of the built-in array methods (e.g., join (), slice (), indexOf (), etc.) take into account the value of an array's length property when they're called.
