Array & Exception Handling in C# (CSharp)
Download as pptx, pdf0 likes166 views
The document discusses arrays and exception handling in C#. It describes arrays as groups of like-typed variables referred to by a common name. Arrays can be one-dimensional or multi-dimensional. Exception handling in C# uses try, catch, finally and throw keywords to handle errors. The try block contains code that may cause exceptions, catch blocks catch specific exception types, finally ensures code runs regardless of exceptions, and throw raises exceptions. An example demonstrates declaring, initializing, and accessing arrays as well as try/catch exception handling.
![Array Declaration
• Syntax :
< Data Type > [ ] < Array_Name >
• Here:
< Data Type > : It define the element type of the array.
[ ] : It define the size of the array.
< Array_Name > : It is the Name of array.
• Example :
int[] x;
string[] s;
• Note :
Only Declaration of an array doesn’t allocate memory to the
array. For that array must be initialized.
7/2/2020 Array & Exception Handling in C# 4](https://image.slidesharecdn.com/05c-200702170250/85/Array-Exception-Handling-in-C-CSharp-4-320.jpg)
![Array Initialization
• Syntax :
type [ ] < Name_Array > = new < data_type > [size];
• Here:
type specifies the type of data being allocated,
size specifies the number of elements in the array,
Name_Array is the name of array variable.
new will allocate memory to an array according to its size.
7/2/2020 Array & Exception Handling in C# 5](https://image.slidesharecdn.com/05c-200702170250/85/Array-Exception-Handling-in-C-CSharp-5-320.jpg)
![Array Initialization(cont…)
To Show Different ways for the Array Declaration and
Initialization:
• Example 1 :
– defining array with size 5. But not assigns values
– int[] intArray1 = new int[5];
• Example 2 :
– defining array with size 5 and assigning values at the same time
– int[] intArray2 = new int[5]{1, 2, 3, 4, 5};
• Example 3 :
– defining array with 5 elements which indicates the size of an array
– int[] intArray3 = {1, 2, 3, 4, 5};
7/2/2020 Array & Exception Handling in C# 6](https://image.slidesharecdn.com/05c-200702170250/85/Array-Exception-Handling-in-C-CSharp-6-320.jpg)
![One Dimensional Array
• In this array contains only one row for storing the values. All
values of this array are stored contiguously starting from 0 to
the array size. For example, declaring a single-dimensional
array of 5 integers :
• Syntax :
type [ ] < Array_Name> = new < data_type > [size];
• Example:
int[ ] array_int = new int[5];
7/2/2020 Array & Exception Handling in C# 9](https://image.slidesharecdn.com/05c-200702170250/85/Array-Exception-Handling-in-C-CSharp-9-320.jpg)
![Multidimensional Arrays(cont…)
• The multi-dimensional array declaration, initialization and
accessing is as follows :
• Syntax :
Creates a two-dimensional array of four rows and two
columns.
int[ , ] intarray = new int[4, 2];
Creates an array of three dimensions, 4, 2, and 3
int[ , , ] intarray1 = new int[4, 2, 3];
7/2/2020 Array & Exception Handling in C# 11](https://image.slidesharecdn.com/05c-200702170250/85/Array-Exception-Handling-in-C-CSharp-11-320.jpg)
Array & Exception Handling in C# (CSharp)
- 1. Presentation Topic: Array & Exception Handling in C# Name :Md. Sihab Uddin Batch : 6th Semester : 8th ID. : 00616306005 Pundra University of Science & Technology Computer Science & Engineering 7/2/2020 1Array & Exception Handling in C#
- 2. Arrays • An array is a group of like-typed variables that are referred to by a common name. • The data types of the elements may be any valid data type like char, int, float, etc. • The elements are stored in a contiguous location. • Length of the array specifies the number of elements present in the array. • The variables in the array are ordered and each has an index beginning from 0. 7/2/2020 Array & Exception Handling in C# 2
- 3. Arrays(cont…) • The following figure shows how array stores values sequentially : 7/2/2020 Array & Exception Handling in C# 3
- 4. Array Declaration • Syntax : < Data Type > [ ] < Array_Name > • Here: < Data Type > : It define the element type of the array. [ ] : It define the size of the array. < Array_Name > : It is the Name of array. • Example : int[] x; string[] s; • Note : Only Declaration of an array doesn’t allocate memory to the array. For that array must be initialized. 7/2/2020 Array & Exception Handling in C# 4
- 5. Array Initialization • Syntax : type [ ] < Name_Array > = new < data_type > [size]; • Here: type specifies the type of data being allocated, size specifies the number of elements in the array, Name_Array is the name of array variable. new will allocate memory to an array according to its size. 7/2/2020 Array & Exception Handling in C# 5
- 6. Array Initialization(cont…) To Show Different ways for the Array Declaration and Initialization: • Example 1 : – defining array with size 5. But not assigns values – int[] intArray1 = new int[5]; • Example 2 : – defining array with size 5 and assigning values at the same time – int[] intArray2 = new int[5]{1, 2, 3, 4, 5}; • Example 3 : – defining array with 5 elements which indicates the size of an array – int[] intArray3 = {1, 2, 3, 4, 5}; 7/2/2020 Array & Exception Handling in C# 6
- 7. Array(Example) 7/2/2020 Array & Exception Handling in C# 7
- 8. Array(Example) 7/2/2020 Array & Exception Handling in C# 8
- 9. One Dimensional Array • In this array contains only one row for storing the values. All values of this array are stored contiguously starting from 0 to the array size. For example, declaring a single-dimensional array of 5 integers : • Syntax : type [ ] < Array_Name> = new < data_type > [size]; • Example: int[ ] array_int = new int[5]; 7/2/2020 Array & Exception Handling in C# 9
- 10. Multidimensional Arrays • The multi-dimensional array contains more than one row to store the values. • It is also known as a Rectangular Array in C# because it’s each row length is same. • It can be a 2D-array or 3D-array or more. • To storing and accessing the values of the array, one required the nested loop. 7/2/2020 Array & Exception Handling in C# 10
- 11. Multidimensional Arrays(cont…) • The multi-dimensional array declaration, initialization and accessing is as follows : • Syntax : Creates a two-dimensional array of four rows and two columns. int[ , ] intarray = new int[4, 2]; Creates an array of three dimensions, 4, 2, and 3 int[ , , ] intarray1 = new int[4, 2, 3]; 7/2/2020 Array & Exception Handling in C# 11
- 12. Exception • Exceptions are unusual error conditions that occur during execution of a program or an application. • An exception is an unwanted or unexpected event, which occurs during the execution of a program i.e at runtime, that disrupts the normal flow of the program’s instructions. 7/2/2020 Array & Exception Handling in C# 12
- 13. Exception Handling C# exception handling is built upon four keywords: • try − A try block identifies a block of code for which particular exceptions is activated. It is followed by one or more catch blocks. • catch − A program catches an exception with an exception handler at the place in a program where you want to handle the problem. • finally − The finally block is used to execute a given set of statements. • throw − A program throws an exception when a problem shows up. This is done using a throw keyword. 7/2/2020 Array & Exception Handling in C# 13
- 14. Exception Handling(cont…) • Syntax: try { // statements causing exception } catch( ExceptionName e1 ) { // error handling code } catch( ExceptionName eN ) { // error handling code } finally { // statements to be executed } 7/2/2020 Array & Exception Handling in C# 14
- 15. Exception Handling(Example) 7/2/2020 Array & Exception Handling in C# 15
- 16. Thank You 7/2/2020 16Array & Exception Handling in C#