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JavaScript String Length property explained With Example

javascript string length

JavaScript length is a property that is used to determine the number of elements in an array or the number of characters in a string. This property is commonly used to loop through the elements of an array or to access specific characters in a string.

How does JavaScript return the length of a string?

Java script will not return the length but it will return the coding unit which is occupied by a string. In this UTF-16 string is used for formatting methods for store characters.In this, the characters of the string are encoded into a 16-bit long binary number being stored. so whenever a property of length is involved. JavaScript looks up and returns the number of code units which is occupied by the string .this is why JavaScript returns 2 in certain characters for the length property which is called emoji etc. . it does this because takes the 2 code units.

How do you find the length of a string in JavaScript?

By using the length property the length of a string in a javascript can be found. because length is a property it should be called an instance of a string.

javascript string length example, consider the array given below -:

var colors = ["red", "green", "blue"];
console.log(colors.length); // 3

Here, the length property is used to determine the number of elements in the “colors” array. This can be useful when looping through the array, as it allows you to know the number of iterations needed.

Similarly, the length property can also be used on strings to determine the number of characters.

var test_name = "Alex";
console.log(test_name.length); // 4

This can be useful when working with strings, for example to access specific characters or to determine if a string is within a certain length range.

It’s worth noting that the length property is zero-based, meaning that the first element of an array is at index 0 and the last element is at index length-1.

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