The distinction between the variable types created by `var` and by `let` is significant, and a switch to `let` will help alleviate many of the variable scope issues which have caused confusion in the past.

This rule raises an issue when `var` is used instead of `const` or `let`.

## Noncompliant Code Example

    var color = "blue";
    var size = 4;

## Compliant Solution

    const color = "blue";
    let size = 4;