Problem statement:- Program to Find the index of an element in an array.
Example:-
Input : Given
size=5
arr[]=[4,5,7,3,9]
Search Element=7
/*Index[0]=4
Index[1]=5
Index[2]=7
Index[3]=3
Index[4]=9*/
Output:
Index=2
Data requirement:-
Input Data:- size, arr, ele
Output Data:-ele, index
Additional Data:- i, temp
Program in C
Input Data:- size, arr, ele
Output Data:-ele, index
Additional Data:- i, temp
Program in C
Here is the source code of the C Program to Find the index of an element in an array.
Code:
#include<stdio.h>
main()
{
printf("Enter the size of the array:");
int size;
scanf("%d",&size);
int arr[size];
int i,temp=0;
printf("Enter the Element of the array:\n");
for(i=0;i<size;i++)
{
scanf("%d",&arr[i]);
}
int ele;
printf("\nEnter the search element:");
scanf("%d",&ele);
printf("\nArray elements are:");
for(i=0;i<size;i++)
{
printf("%d ",arr[i]);
}
int index;
for(i=0;i<size;i++)
{
if(arr[i]==ele)
{
temp=1;
index=i;
}
}
if(temp==1)
printf("\nIndex of Search Element %d is %d",ele,index);
else
printf("\nElement is not found....");
}
Enter the size of the array:5
Enter the Element of the array:
4
5
7
3
9
Enter the search element:7
Array elements are:4 5 7 3 9
Index of Search Element 7 is 2
Program in C++
Here is the source code of the C++ Program to Find the index of an element in an array.
Code:
#include<iostream>
using namespace std;
main()
{
cout<<"Enter the size of the array:";
int size;
cin>>size;
int arr[size];
int i,temp=0;
cout<<"Enter the Element of the array:\n";
for(i=0;i<size;i++)
{
cin>>arr[i];
}
int ele;
cout<<"\nEnter the search element:";
cin>>ele;
cout<<"\nArray elements are:";
for(i=0;i<size;i++)
{
cout<<arr[i]<<" ";
}
int index;
for(i=0;i<size;i++)
{
if(arr[i]==ele)
{
temp=1;
index=i;
}
}
if(temp==1)
cout<<"\nIndex of Search Element "<<ele<<" is "<<index;
else
cout<<"\nElement not found....";
}
Enter the size of the array:6
Enter the Element of the array:
4
3
9
7
5
10
Enter the search element:10
Array elements are:4 3 9 7 5 10
Index of Search Element 10 is 5
Program in Java
Here is the source code of the Java Program to Find the index of an element in an array.
Code:
import java.util.Scanner;
public class SearchElement {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
System.out.println("Enter the size of the array:");
int i,temp=0,size;
size=sc.nextInt();
int arr[ ]=new int[size];
System.out.println("Enter the Element of the array:");
for(i=0;i<size;i++)
{
arr[i]=sc.nextInt();
}
int ele;
System.out.print("\nEnter the search element:");
ele=sc.nextInt();
System.out.print("\nArray elements are:");
for(i=0;i<size;i++)
{
System.out.print(arr[i]+" ");
}
int index = 0;
for(i=0;i<size;i++)
{
if(arr[i]==ele)
{
temp=1;
index=i;
}
}
if(temp==1)
System.out.print("\nIndex of Search Element "+ele+" is "+index);
else
System.out.print("\nElement is not found....");
sc.close();
}
}
Enter the size of the array:
4
Enter the Element of the array:
3
12
14
15
Enter the search element:14
Array elements are:3 12 14 15
Index of Search Element 14 is 2
Program in Python
Here is the source code of the Python Program to Find the index of an element in an array.
Code:
arr=[]
temp=0
pos=0
index=0
size = int(input("Enter the size of the array: "))
print("Enter the Element of the array:")
for i in range(0,size):
num = int(input())
arr.append(num)
print("Enter the search element:")
ele=int(input())
print("Array elements are:")
for i in range(0,size):
print(arr[i],end=" ")
for i in range(0,size):
if arr[i] == ele:
temp = 1
index=i
if temp==1:
print("\nIndex of Search Element ",ele," is ",index)
else:
print("\nElement not found....")
Enter the size of the array: 3
Enter the Element of the array:
4
5
2
Enter the search element:
5
Array elements are:
4 5 2
Index of Search Element 5 is 1
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