Traversing in array
Traversing in array
In traversing in array in C , each element of an array is access exactly for once for processing. This is also called visiting of an array.After insertion or deletion operation you would usually want to check whether it has been successfully or not, to check this we can use traversing, and can make sure that whether the element is successfully insert or delete.
Diagramatic representation
Approach
1.Start a loop from 0 to N-1, where N is the size of array.
2. Access every element of array with help of arr[index]
3. Print the elements.
Algorithm
Size of List is N , a count[ counter] will have to be maintainedt o keep track of the number of elements visited.
let C is a variable for count and initialize to 1 that is lower bound of LIST.
With every visit the count C is increment and match with upper bound N of LIST
if C is less than or equal N then the steps are repeated otherwise algorithm stops.
Algorithm step :
1. C=1
2. Process LIST[C]
3. C= C+1
4. if (C<=N) then repeat 2 and 3
5. End.
Program in C
#include <stdio.h>
main() {
int arr[] = {1,3,5,7,8};
int item = 10, k = 3, n = 5;
int i = 0, j = n;
printf("The original array elements are :\n");
for(i = 0; i<n; i++) {
printf("arr[%d] = %d \n", i, arr[i]);
}
}
Output
The original array elements are : arr[0] = 1 arr[1] = 3 arr[2] = 5 arr[3] = 7 arr[4] = 8
Program in CPP
#include <iostream>
using namespace std;
int main()
{
int arr[5]={10, 0, 20, 0, 30};
for (int i: arr)
{
cout<<i<<"\n";
}
Output
10 20 30 40 50
We can traverse the element in array in JAVA using following method
1. Using for loop:
2. Using for each loop
1.Using for loop:
In this method all where we just have to use a for loop where a counter variable accesses each element one by one.
Program in Java
import java.io.*;
class ABC
{
public static void main(String args[]) throws IOException
{
int ar[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
int i, x;
for (i = 0; i < ar.length; i++)
{
x = ar[i];
System.out.print(x + " ");
}
}
}
Output
1 2 3 4 5 6 7 8
2. Using for each loop
In this method for each loop optimizes the code, save typing and time.
Program
import java.io.*;
class GFG
{
public static void main(String args[]) throws IOException
{
int ar[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
int x;
for (int i : ar)
{
x = i;
System.out.print(x + " ");
}
}
}
Output
1 2 3 4 5 6 7 8
Time complexity
O(n)
Also read the various Array operations