There are many ways for checking whether the array contains any specific value or not, one of them is:
Examples:
Input: arr[] = {10, 30, 15, 17, 39, 13}, key = 17
Output: TrueInput: arr[] = {3, 2, 1, 7, 10, 13}, key = 20
Output: False
Approach:
Using in-built functions: In C language there is no in-built function for searching
C++
#include <bits/stdc++.h> using namespace std;
int main()
{ vector< int > v{ 10, 25, 15, 12, 14 };
int key = 15;
// Using inbuilt function 'find'
if (find(v.begin(), v.end(), key) != v.end())
cout << key << " is present in the array" ;
else
cout << key << " is not present in the array" ;
return 0;
} |
Java
/*package whatever // do not write package name here */ import java.io.*;
import java.util.Arrays;
class GFG {
public static void main(String[] args)
{
Integer arr[] = { 10 , 25 , 15 , 12 , 14 };
int key = 15 ;
// Using inbuilt function 'contains'
boolean found = Arrays.asList(arr).contains(key);
if (found == true ) {
System.out.println(
key + " is present in the array" );
}
else {
System.out.println(
key + " is not present in the array" );
}
}
} |
Python3
if __name__ = = '__main__' :
arr = [ 10 , 25 , 15 , 12 , 14 ]
key = 15 found = False
if key in arr:
found = True
if found = = True :
print (key, end = " is present in the array" )
else :
print (key, end = " is not present in the array" )
|
C#
// C# Code for above approach using System;
public class GFG {
public static void Main( string [] args)
{
int []arr = { 10, 25, 15, 12, 14 };
int key = 15;
// Using inbuilt function 'contains'
bool found = Array.Exists(arr, x => x == key);
if (found == true ) {
Console.WriteLine(key + " is present in the array" );
}
else {
Console.WriteLine(key + " is not present in the array" );
}
}
} // This code is contributed by AnkThon |
PHP
<?php $arr = array (10, 25, 15, 12, 14);
$key = 15;
if (in_array( "$key" , $arr )){
echo "$key is present in the array" ;
}
else {
echo "$key is not present in the array" ;
}
?> |
Javascript
<script> const arr = [10, 25, 15, 12, 14];
const key = 15
if (arr.includes(key) == true ){
console.log( key + " is present in the array" );
}
else {
console.log( key + " is not present in the array" );
}
</script> |
Output
15 is present in the array
Time Complexity: O(N)
Auxiliary Space: O(1)
Apart from these inbuilt functions, there are other methods that one can use like:
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