C# How ToLesson 37Free preview

Add Two Numbers

This lesson is part of C# · All levels

Summary

This lesson summarizes how to sum two numbers: declare the variable, calculate the result, and then display it. The interactive version adds input reading and type conversion so that users can enter their own numbers. It's a basic exercise that combines variables, operators, output, and inputs at once.

Key points

Select the appropriate numerical type; double if the result can be a decimal number.
Save the addition results on a separate variable for easy display or reuse.
The input from Console.ReadLine must be converted to a number with Parse or TryParse.
Always validate the input so that the program does not crash when the user types the letter.
The general flow: read the input, convert, count, and then display the result.

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