Core Methods of String Objects

Some of the core methods are discussed in this lesson. You can find a list of all the String methods in Rust documentation of Strings.

Capacity in Bytes

The capacity gives the number of bytes allocated to the String, unlike len which gives the number of bytes taken by the String object. To get the capacity of a variable in bytes, use the built-in function capacity().

Syntax

The general syntax is:

str.capacity()

Here str is the string whose capacity is to be found.

Note: The length of String will always be less than or equal to the capacity.