C# Fundamentals · Strings & Numbers · Lesson 9 of 22
Reading User Input
Concept
Reading User Input
Console.ReadLine() reads a line of text typed by the user, which always comes back as a string that you may need to convert.
By the end of this lesson
- Explain the core idea behind Reading User Input.
- Predict output before running a change.
- Test one realistic and one unusual input.
- Use the result to make the next decision.
How to study this page
- 1. Read one concept.
- 2. Change the example.
- 3. Run, compare, and explain.
- 4. Complete the challenge below.
ExampleRunnable
Console.Write("Enter your age: ");
string input = Console.ReadLine();
int age = int.Parse(input);
Console.WriteLine(age + 1);Self-check before continuing
Without looking at the example, describe what changes when you modify one input in Reading User Input. Then reopen the editor and prove your explanation with a small test.
You are ready to continue when you can predict, test, and explain the result.
Your turn
Write code that reads a name from the console and prints a greeting using it.
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Console