The document discusses arrays, which are collections of same-typed data organized in a sequence. It describes one-dimensional, two-dimensional, and multi-dimensional arrays. Initialization of arrays involves declaring the type, name, and size. Values can be initialized individually or in sets within curly braces. Loops are used to input or search values in arrays, running from 0 to the size minus 1. Two-dimensional arrays are often considered multi-dimensional and allow nested looping through rows and columns. Deletion in arrays involves replacing matching values with 0.

2. What Is Array ??
 Collection Of same type of data.
 Data Type ( Int, float, double, char).
 Saves data in a sequence.
 Examples:
 1. Employees Info of an organization.
 2. Score of students of a class.
 3. Table of daily rainfall data.
 4. Temperature record of hours.

3.  Three Types Of Array
 One Dimensional Array(1-D)
 Two Dimensional Array(2-D)
 Multi Dimensional Array(A[s1][s2[s3][s4]…)

4.  Initialization:
 Type Array_name [Size];
 Type Array_name [Size] = {list of Values};
 Example:
 int A[10];
 int A[5] ={50,60,70,80,90};
 User Define:
 int A[n]; [Size of Array declare by User.]

5. Two Dimensional Array(2-D)
 Initialization:
 Type Array_name[row_size][column_size];
 Type Array_name[row_size][column_size]={{s1},{s2},{s3}};
 Here s1,s2,s3 refers to sets of number.
 Example:
 int A[3][3] ;
 int A[3][3] = {{10,20,45},{42,79,81},{89,9,36}};
 User Define:
 int A[r][n];
 Value of {r,n} given by user .

6.  Initialization:
 Type Array_name[s1][s2][s3]…..[sm];
Example:
int survey [3][5][3];
float table [5][4][5][3];
Pros & Cons:
Two dimensional array often
consider as multi dimensional array.
Multi dimensional array is derived
from basic C Language.
Multi Dimensional array
Example

7.  One Dimensional Array(1-D):
 Loops runs from 0 to n-1 th index.
 Sorting might involve if data was ask in sorting mode.
How 1-D array insertion Works:
For 0 to n-1
{input value;(Using scanf)}
int A[5]

8. Insertion In An Array
 Two Dimensional Array(2 - D):
 Loops runs
for 0 to row – 1
{for 0 to column – 1
input value;(scanf) }
How It works:
int A[3][4];
Step 1 Step 2 Step 3

9.  One Dimensional Array(1-D):
 User given input.
 Search for data
 Runs in the loops looking for the given input.
2 Condition: Found or Not found
Found condition:
Example: search: 4 (Found if available).
 Not Found (Print Not Found)
ORIGIN (Array) After Deletion

10. Two Dimensional Array(2D)
 User Given Input(search: 12)
 Process:
Runs inside the loops looking for element.
Condition:
If found delete the input value and replace by ‘0’
Else print not found.
Example: Before After