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This website aims to give a quick reference for VB.NET, Python, C# and pseudocode and is aimed primarily at teachers & students working towards a GCSE in Computer Science

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Skill

Description

VB.NET

Python

C#

A **list** is similar to an **array**: both allow more than one piece of data to be stored in the same variable.

It's not possible to add or remove data to an **array** after it's been set for the first time but it is possible to add or remove data to a **list**.

*This example creates a list called numbers and adds three integer numbers into it before displaying the sum of all the numbers added together.*

SET numbers to [1, 2, 3]
SEND SUM(numbers) TO DISPLAY

Dim numbers As New List(Of Integer)
numbers.AddRange({1, 2, 3})
MsgBox(numbers.Sum())
' You could also do:
Dim numbers As New List(Of Integer)
numbers.Add(1)
numbers.Add(2)
numbers.Add(3)
MsgBox(numbers(0) + numbers(1) + numbers(2))

numbers = []
numbers.append(1)
numbers.append(2)
numbers.append(3)
print(sum(numbers))

// spec doesn't mention lists: only arrays
array numbers[3]
numbers[0] = 1
numbers[1] = 2
numbers[2] = 3
print(numbers[0] + numbers[1] + numbers[2])

numbers[3]
set numbers[0] = 1
set numbers[1] = 2
set numbers[2] = 3
output numbers[0] + numbers[1] + numbers[2]

// using System.Collections.Generic;
// using System.Linq;
List<int> numbers = new List<int>();
numbers.Add(1);
numbers.Add(2);
numbers.Add(3);
// Sum requires System.Linq
Console.WriteLine(numbers.Sum());

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