What is meant by "Strings are not mutable." I cannot understand it inspite of it we can change the value of string through out ?

Answer 1

you do not actually change the content of the string, but rather create a new one

in java for instance, the old string will remain in the memory until the garbage collector will clear it

Answer 2

once if you create a string object you cannot modify that string but only thing you can do is you can refer the ref of string object to another string object