Managing One-Dimensional Array in C++

What is an Array:
An array is “a group of elements forming a complete unit
The following are characteristics of an array:
- An array is a collection of elements.
- All elements contained in an array are of the same kind.

- This collection forms a complete set.

Declaring and Initializing static arrays
Syntax:
element-type array-name [number of elements] = {optional initial values}
Example:
int MyNumber[] ={1,2,3,4,5}
int MyNumber[4] = {32, 87, 120, 247};
int MyNumber[4] = {0}; // initialize all integers to 0

Accessing data stored in an Array
#include <iostream>
using namespace std;
int main (){
    int Arr[4] = {32, 87, 120, 247};
    cout << “First element at index 0: “ << Arr[0] << endl;        //32
    cout << “Second element at index 1: “ << Arr[1] << endl;  //87
    cout << “Third element at index 2: “ << Arr[2] << endl;      //120
    cout << “Fourth element at index 3: “ << Arr[3] << endl;    //247
    return 0;

}

Modifying Data Stored in an Array
#include <iostream>
using namespace std;
int main(){
    const int length = 4;
    int Arr [length] = {0};
    cout << “Enter index of the element to be changed: “;
    int nElementIndex = 0;
    cin >> nElementIndex;
    cout << “Enter new value: “;
    cin >> Arr [nElementIndex];
    cout << “First element at index 0: “ << Arr [0] << endl;
    cout << “Second element at index 1: “ << Arr [1] << endl;
    cout << “Third element at index 2: “ << Arr [2] << endl;
    cout << “Fourth element at index 3: “ << Arr [3] << endl;
    return 0;

}
Example:

#include<iostream> 

int main(){

        int a[100],n;
// Input n
        do{ 

              cout<<"\n n= "; cin>>n; 
              if(n<1||n>100)   cout<<"\n Input n again !";
        }while (n<1||n>100);
 // input array

        for (int i=0; i<n;i++){

               cout<<"\n a["<<i<<"]= "; 
               cin>>a[i];  

        }

// Print array

        cout<<"\n Print values of array: ";
        for (i=0;i<n;i++)
               cout<<a[i]<<", ";

         getch();

         return 0;

}