Notesale: Turn your study into money

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String
• String is consider as array of characters in all programming languages
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• A string is an object of type String whose value is text
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In case of C and C++ there is null character ie ‘\0’ at the end of
string
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The
Length property of a string represents the number of Char objects it
contains, not the number of Unicode characters
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string vs
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String
• In C#, the string keyword is an alias for String
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• The String class provides many methods for safely creating, manipulating,
and comparing strings
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There are different ways in which we can create string as
1
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string str1;
2
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string str2 = null;
3
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string str3 = “”;
4
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Use the Empty constant instead of the literal ""
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String
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Initialize with a regular string literal
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Initialize with a verbatim string literal
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Use System
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System
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In local variables (i
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within a method body)
var str8 = " My Notes ";
9
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const string str9 = " My Notes ";
10
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char[] arr = {‘M’,’y’,’N’,’o’,’t’,’e’,’s’};
string str10 = new string(arr);

Immutability of String Objects :
• String objects are immutable: they cannot be changed after they
have been created
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• In the following example, when the contents of str1 and str2 are
concatenated to form a single string, the two original strings are
unmodified
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• That new object is assigned to the variable s1, and the original
object that was assigned to s1is released for garbage collection
because no other variable holds a reference to it
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This actually creates a new string object and
stores it in str1, releasing the reference to the original object
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Console

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