C++ String reserve()
This function requests a change in capacity.
Consider a string str and l is planned length of the string. Its syntax would be:
l is the planned length for the string
Note: capacity of the string can be greater than or equal to 'l'.
It does not return any value.
Let's see the simple example.
Capacity is 27 Now,capacity is : 54
In this example, we observe that how capacity of the string varies using reserve() function.