Answer
A programming language is a formal set of instructions and syntax rules that allows developers to communicate with a computer and tell it exactly what actions to perform, since computers only understand machine code at the lowest level. Programming languages are needed because writing raw machine code directly is extremely difficult and error prone for humans, so languages like C# provide a much more readable and structured way to express logic, which is then translated into machine instructions the computer can actually execute.
// Readable C# code instead of raw machine instructions
int total = 10 + 20;
Console.WriteLine(total);Real-world example A developer writes a payroll calculation using clear, readable C# statements instead of manually crafting binary machine instructions, making the code easy for other developers to understand, review, and maintain later.