Values, types, and strings

The idea

C# assigns a type to every variable. var asks the compiler to infer that type from the initializer; it does not make the variable dynamically typed. Whole-number literals normally produce int values, while a suffix such as m creates a decimal literal. Choose the numeric representation from the problem, and remember that integer division discards its fractional part before assignment.

Strings provide methods for transformations and properties such as Length for inspection. Their contents are immutable, so a transformation returns a value instead of editing the receiver. Interpolation places expressions inside a readable string template. These examples use ASCII text so character positions and displayed characters line up predictably.

using System;
var completed = 9;
var days = 4;
string label = "  draft  ";
Console.WriteLine(completed / days);
Console.WriteLine($"[{label.Trim()}]");

2
[draft]

Both operands of division are integers, producing two. Trim returns a new string; interpolation adds the visible brackets around that result.