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Array.BinarySearch(Array, Object) Method with examples in C#
The Array.BinarySearch(Array, Object) method in C# is used to search an entire one-dimensional sorted array for a specific element, using the IComparable interface implemented by each element of the array and by the specified object.
Syntax
public static int BinarySearch (Array arr, object val);
Above, arr is the sorted 1-D array, whereas val is the object to search for.
Example
using System;
public class Demo {
public static void Main() {
int[] intArr = {5, 10, 15, 20};
Array.Sort(intArr);
Console.WriteLine("Array elements...");
foreach(int i in intArr) {
Console.WriteLine(i);
}
Console.Write("Element 25 is at index = " + Array.BinarySearch(intArr, 20));
}
}Output
Array elements... 5 10 15 20 Element 25 is at index = 3
Example
using System;
public class Demo {
public static void Main() {
string[] strArr = {"John", "Tim", "Fedric", "Gary", "Harry", "Damien"};
Array.Sort(strArr);
Console.WriteLine("Array elements...");
foreach(string s in strArr) {
Console.WriteLine(s);
}
Console.Write("Element Gary is at index = " + Array.BinarySearch(strArr, "Gary"));
Console.Write("
Element Tom is at index = " + Array.BinarySearch(strArr, "Tom"));
}
}Output
Array elements... Damien Fedric Gary Harry John Tim Element Gary is at index = 2 Element Tom is at index = -7
Updated on: 03-Dec-2019
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