Use a `+` with two numbers and you'll get addition. But use it with a string and anything else, and you'll get concatenation. This could be confusing, specially if it's not obvious that one of the operands is a string. It is recommended to explicitly convert the non-string component to make it easier to understand to future maintainers.

This rule raises an issue when `+` is used with a string and a non-string.

## Noncompliant Code Example

    var x = 5 + 8;  // okay
    var z = "8"
    var y = 5 + z;  // Noncompliant; yields string "58"

## Compliant Solution

    var x = 5 + 8;
    var z = "8";
    var y = 5 + Number(z);