Handling Unmatched Cases with a Default in Go Switch Statements

Switch statements in Go are powerful control flow tools, but sometimes a condition might not match any of the defined cases. This challenge focuses on implementing a default case within a Go switch statement to gracefully handle such unmatched scenarios. Understanding how to handle these situations is crucial for writing robust and predictable Go code.

Problem Description

You are tasked with writing a Go function that takes an integer as input and uses a switch statement to determine its category. The categories are:

• 0: "Zero"
• 1: "Positive One"
• 2-9: "Positive Multiple"
• Negative: Any negative integer.

The function should return a string describing the category of the input integer. Crucially, you must include a default case in your switch statement to handle any input that doesn't fall into the explicitly defined categories. The default case should return the string "Unknown".

Key Requirements:

• The function must be named CategorizeInteger.
• It must accept an integer as input.
• It must return a string representing the category.
• The switch statement must include a default case.
• The default case must return "Unknown".
• The logic for categorizing the integer must be accurate as described above.

Expected Behavior:

The function should correctly categorize integers based on the rules. If an integer doesn't match any of the defined cases, the default case should be triggered, and "Unknown" should be returned.

Edge Cases to Consider:

• Input of 0.
• Input of 1.
• Input of integers between 2 and 9 (inclusive).
• Input of negative integers.
• Very large positive or negative integers (though no specific size limits are imposed, ensure the logic handles them correctly).

Examples

Example 1:

Input: 5
Output: "Positive Multiple"
Explanation: 5 falls within the range of 2-9, so the corresponding case is executed.

Example 2:

Input: -3
Output: "Negative"
Explanation: -3 is a negative integer, triggering the "Negative" case.

Example 3:

Input: 10
Output: "Unknown"
Explanation: 10 does not match any of the defined cases (0, 1, or 2-9), so the default case is executed.

Example 4:

Input: 0
Output: "Zero"
Explanation: 0 matches the "Zero" case.

Constraints

• The input integer can be any integer value (positive, negative, or zero).
• The function must return a string.
• The code should be readable and well-formatted.
• No external libraries are allowed.

Notes

Consider using range expressions within the switch statement to efficiently handle the 2-9 range. Remember that the default case is executed only when no other case matches. Think about the order of your cases to ensure the correct behavior.