


The Array class is the base class for all arrays in C#. It is defined in the System namespace.
The following are the methods of the Array class in C#-
Teacher number | Methods and instructions | 1 |
Clear Sets a range of elements in an array to zero, False, or null, depending on the element type. |
---|---|
2 |
Copy(Array, Array, Int32) From the array One element starts by copying a range of elements and pasting them into another array starting from the first element. The length is specified as a 32-bit integer. |
3 |
CopyTo(Array, Int32) Start at the specified target array index , copies all elements of the current one-dimensional array to the specified one-dimensional array. The index is specified as a 32-bit integer. |
4 | GetLength Gets a 32-bit integer representing the length in the specified dimension of the array Number of elements. |
5 |
GetLongLength Gets a 64-bit integer representing the length in the specified dimension of Array Number of elements. |
6 |
GetLowerBound Get the lower bound of the specified dimension in the array. |
7 | GetType strong> Get the Type of the current instance. (Inherited from Object.) |
8 |
GetUpperBound p> Get the specified dimension in the array upper limit. |
9 |
GetValue(Int32) Get the value at the specified position in the one-dimensional array . The index is specified as a 32-bit integer. |
10 |
IndexOf(array, object) Search for the specified object and return the entire The index of the first occurrence in the dimensional array. |
11 |
Reverse(Array) Reverse the order of elements in one dimension Array. |
#The following are the properties of the Array class in C#.
Sr.No | Properties and Description |
---|---|
1 |
IsFixedSize Gets a value indicating whether the array has a fixed size. |
2 |
IsReadOnly Gets a value indicating whether the array is read-only. |
3 |
Length Get a 32-bit integer representing the length of the array in all dimensions The total number of elements. |
4 |
LongLength Get a 64-bit integer representing the total number in all dimensions of the array Elements. |
5 |
Ranking Get the ranking (dimension) of the array. |
Let us see an example of Reverse method to reverse the characters in a character array and find if it is a palindrome -
Let's try the complete example. Here, our string is "Level", which will give the same result when inverted.
Example
using System; namespace Demo { class Program { static void Main(string[] args) { string string1, rev; string1 = "Level"; char[] ch = string1.ToCharArray(); Array.Reverse(ch); rev = new string(ch); bool b = string1.Equals(rev, StringComparison.OrdinalIgnoreCase); if (b == true) { Console.WriteLine("String " + string1 + " is a Palindrome!"); }else { Console.WriteLine("String " + string1 + " is not a Palindrome!"); } Console.Read(); } } }
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The char array stores character sequences in C language and is declared as char array_name[size]. The access element is passed through the subscript operator, and the element ends with the null terminator '\0', which represents the end point of the string. The C language provides a variety of string manipulation functions, such as strlen(), strcpy(), strcat() and strcmp().

In C language, special characters are processed through escape sequences, such as: \n represents line breaks. \t means tab character. Use escape sequences or character constants to represent special characters, such as char c = '\n'. Note that the backslash needs to be escaped twice. Different platforms and compilers may have different escape sequences, please consult the documentation.

In C, the char type is used in strings: 1. Store a single character; 2. Use an array to represent a string and end with a null terminator; 3. Operate through a string operation function; 4. Read or output a string from the keyboard.

The usage methods of symbols in C language cover arithmetic, assignment, conditions, logic, bit operators, etc. Arithmetic operators are used for basic mathematical operations, assignment operators are used for assignment and addition, subtraction, multiplication and division assignment, condition operators are used for different operations according to conditions, logical operators are used for logical operations, bit operators are used for bit-level operations, and special constants are used to represent null pointers, end-of-file markers, and non-numeric values.

The difference between multithreading and asynchronous is that multithreading executes multiple threads at the same time, while asynchronously performs operations without blocking the current thread. Multithreading is used for compute-intensive tasks, while asynchronously is used for user interaction. The advantage of multi-threading is to improve computing performance, while the advantage of asynchronous is to not block UI threads. Choosing multithreading or asynchronous depends on the nature of the task: Computation-intensive tasks use multithreading, tasks that interact with external resources and need to keep UI responsiveness use asynchronous.

In C language, char type conversion can be directly converted to another type by: casting: using casting characters. Automatic type conversion: When one type of data can accommodate another type of value, the compiler automatically converts it.

There is no built-in sum function in C language, so it needs to be written by yourself. Sum can be achieved by traversing the array and accumulating elements: Loop version: Sum is calculated using for loop and array length. Pointer version: Use pointers to point to array elements, and efficient summing is achieved through self-increment pointers. Dynamically allocate array version: Dynamically allocate arrays and manage memory yourself, ensuring that allocated memory is freed to prevent memory leaks.

A strategy to avoid errors caused by default in C switch statements: use enums instead of constants, limiting the value of the case statement to a valid member of the enum. Use fallthrough in the last case statement to let the program continue to execute the following code. For switch statements without fallthrough, always add a default statement for error handling or provide default behavior.


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