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Immutable Type.

Immutable Type.

Gaurav Gupta

Gaurav Gupta

14y1.7kLearn iOS Programming

Hi,

What does the term immutable mean ? ... and Why String is Immutable Type in .Net ?.

4 Replies

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MuthuMari M14y ago
Hi,

The data value may not be changed.
Note: The variable value may be changed, but the original immutable data value was discarded and a new data value was created in memory.

thanks.

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MuthuMari M14y ago
Hi,

The data value may not be changed.
Note: The variable value may be changed, but the original immutable data value was discarded and a new data value was created in memory.

thanks.

If this post is useful then mark it as "Accepted Answer"
0
Senthilkumar14y ago
Hi Gaurav,

You can never actually change the contents of a string, at least with safe code which doesn't use reflection. Because of this, you often end up changing the value of a string variable. For instance, the code s = s.Replace ("foo", "bar"); doesn't change the contents of the string that s originally referred to - it just sets the value of s to a new string, which is a copy of the old string but with "foo" replaced by "bar".

String Class Once the string object is created, its length and content cannot be modified.
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Jignesh Trivedi14y ago
hi,

In object-oriented and functional programming, an immutable object is an object whose state cannot be modified after it is created.
mutable object means object which can be modified after it is created.
Immutable objects are often useful because they are inherently thread-safe.

Please go through
http://stackoverflow.com/questions/2365272/why-net-string-is-immutable

hope this help.
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