How to create 7-Tuple or Septuple in C#?

The Tuple<T1,T2,T3,T4,T5,T6,T7> class represents a 7-tuple, also known as a septuple. A tuple is a data structure that contains a fixed number of elements in a specific sequence, allowing you to group related values together.

7-tuples are commonly used for −

• Easier access to a data set with seven related values.
• Easier manipulation of a data set.
• To represent a single set of data with seven components.
• To return multiple values from a method.
• To pass multiple values to a method.

Syntax

Following is the syntax for creating a 7-tuple in C# −

Tuple<T1, T2, T3, T4, T5, T6, T7> tuple = new Tuple<T1, T2, T3, T4, T5, T6, T7>(item1, item2, item3, item4, item5, item6, item7);

You can also use the Tuple.Create() method for shorter syntax −

var tuple = Tuple.Create(item1, item2, item3, item4, item5, item6, item7);

Using Constructor to Create 7-Tuple

Example

Let us see an example to implement the 7-tuple using the constructor −

using System;

public class Demo {
    public static void Main(string[] args) {
        Tuple<int, int, int, int, int, int, int> tuple = new Tuple<int, int, int, int, int, int, int>(100, 150, 200, 300, 600, 1000, 2000);
        Console.WriteLine("Value (Item1)= " + tuple.Item1);
        Console.WriteLine("Value (Item2)= " + tuple.Item2);
        Console.WriteLine("Value (Item3)= " + tuple.Item3);
        Console.WriteLine("Value (Item4)= " + tuple.Item4);
        Console.WriteLine("Value (Item5)= " + tuple.Item5);
        Console.WriteLine("Value (Item6)= " + tuple.Item6);
        Console.WriteLine("Value (Item7)= " + tuple.Item7);
        
        if (tuple.Item5 == 600) {
            Console.WriteLine("Exists: Tuple Item 5 = " + tuple.Item5);
        }
        if (tuple.Item6 == 900) {
            Console.WriteLine("Exists: Tuple Item 6 = " + tuple.Item6);
        }
        if (tuple.Item7 == 2000) {
            Console.WriteLine("Exists: Tuple Item 7 = " + tuple.Item7);
        }
    }
}

The output of the above code is −

Value (Item1)= 100
Value (Item2)= 150
Value (Item3)= 200
Value (Item4)= 300
Value (Item5)= 600
Value (Item6)= 1000
Value (Item7)= 2000
Exists: Tuple Item 5 = 600
Exists: Tuple Item 7 = 2000

Using Tuple.Create() Method

Example

You can also use the Tuple.Create() method for a more concise syntax −

using System;

public class Demo {
    public static void Main(string[] args) {
        var tuple = Tuple.Create("John", "Doe", 25, "Engineer", "Microsoft", 75000.50, true);
        Console.WriteLine("First Name: " + tuple.Item1);
        Console.WriteLine("Last Name: " + tuple.Item2);
        Console.WriteLine("Age: " + tuple.Item3);
        Console.WriteLine("Job Title: " + tuple.Item4);
        Console.WriteLine("Company: " + tuple.Item5);
        Console.WriteLine("Salary: " + tuple.Item6);
        Console.WriteLine("Is Active: " + tuple.Item7);
    }
}

The output of the above code is −

First Name: John
Last Name: Doe
Age: 25
Job Title: Engineer
Company: Microsoft
Salary: 75000.5
Is Active: True

Comparing Tuple Items

Example

Let us see another example that demonstrates comparing tuple items −

using System;

public class Demo {
    public static void Main(string[] args) {
        Tuple<int, int, int, int, int, int, int> tuple = new Tuple<int, int, int, int, int, int, int>(100, 150, 200, 300, 600, 1000, 1000);
        Console.WriteLine("Value (Item1)= " + tuple.Item1);
        Console.WriteLine("Value (Item2)= " + tuple.Item2);
        Console.WriteLine("Value (Item3)= " + tuple.Item3);
        Console.WriteLine("Value (Item4)= " + tuple.Item4);
        Console.WriteLine("Value (Item5)= " + tuple.Item5);
        Console.WriteLine("Value (Item6)= " + tuple.Item6);
        Console.WriteLine("Value (Item7)= " + tuple.Item7);
        
        if (tuple.Item5 == 600) {
            Console.WriteLine("Exists: Tuple Item 5 = " + tuple.Item5);
        }
        if (tuple.Item6 == 900) {
            Console.WriteLine("Exists: Tuple Item 6 = " + tuple.Item6);
        }
        if (tuple.Item7 == 2000) {
            Console.WriteLine("Exists: Tuple Item 7 = " + tuple.Item7);
        }
        if (tuple.Item7 == tuple.Item6) {
            Console.WriteLine("Tuple Items Matched!");
        }
    }
}

The output of the above code is −

Value (Item1)= 100
Value (Item2)= 150
Value (Item3)= 200
Value (Item4)= 300
Value (Item5)= 600
Value (Item6)= 1000
Value (Item7)= 1000
Exists: Tuple Item 5 = 600
Tuple Items Matched!

Conclusion

The 7-tuple in C# allows you to group seven related values of different types into a single data structure. You can create 7-tuples using either the constructor syntax or the more convenient Tuple.Create() method, and access individual elements using the Item1 through Item7 properties.