4.arrays
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Arrays allow for the storage of multiple values of the same type under a common name. There are two types of arrays: single dimensional arrays which store values in a list, and multi-dimensional arrays which can store values in a grid. Strings are arrays of characters that are terminated by a null character. Arrays allocate a block of contiguous memory to store the elements.
![Single Dimensional Arrays
1 2 3
int arr [5] = { 1, 2, 3, 4, 5 };
Syntax: base_type array_name [size];
Size
Array name Initialization
Base Type
Memory:
4000 4016 4020
4 5
4004
Total Size:
4 X 5 = 20](https://image.slidesharecdn.com/4-140531014210-phpapp02/85/4-arrays-3-320.jpg)
![Multi Dimensional Arrays
1 2 3 4 5
int arr [3][2] = { {1,2}, {3,4}, {5,6} };
Syntax: base_type array_name [rows][columns];
Size
Array name Initialization
Base Type
Memory
4000 4020 4024
6
4004
Total Size:
4 X 6 = 24
1 2
3 4
5 6
4008
4016
4000](https://image.slidesharecdn.com/4-140531014210-phpapp02/85/4-arrays-4-320.jpg)
![Strings
‘H’ ‘e’ ‘l’ ‘l’
char str[] = “Hello”;
Syntax: char array_name [size];
Size
String name Initialization
Memory:
4000 4005 4006
‘o’ ‘0’
4001
Total Size:
1 X 6 = 6](https://image.slidesharecdn.com/4-140531014210-phpapp02/85/4-arrays-5-320.jpg)
4.arrays
- 1. Arrays What you’ll learn: o Defining and using arrays o Defining and using strings
- 2. What is an array ? An array is a collection of variables of the same type that are referenced by a common name. They are a derived data type. We can divide arrays into two types: Single Dimensional (1-D) arrays Multi Dimensional arrays
- 3. Single Dimensional Arrays 1 2 3 int arr [5] = { 1, 2, 3, 4, 5 }; Syntax: base_type array_name [size]; Size Array name Initialization Base Type Memory: 4000 4016 4020 4 5 4004 Total Size: 4 X 5 = 20
- 4. Multi Dimensional Arrays 1 2 3 4 5 int arr [3][2] = { {1,2}, {3,4}, {5,6} }; Syntax: base_type array_name [rows][columns]; Size Array name Initialization Base Type Memory 4000 4020 4024 6 4004 Total Size: 4 X 6 = 24 1 2 3 4 5 6 4008 4016 4000
- 5. Strings ‘H’ ‘e’ ‘l’ ‘l’ char str[] = “Hello”; Syntax: char array_name [size]; Size String name Initialization Memory: 4000 4005 4006 ‘o’ ‘0’ 4001 Total Size: 1 X 6 = 6
Editor's Notes
- #2: Hello