Trailing Zero Preservation Flag Tool

Description

Parse each signed ordinary decimal token and count only its fractional trailing zeros.

Numeric-looking text has both a value and a written form. Signs, decimal places, exponent markers and trailing zeros can carry display information that ordinary numeric conversion discards; formatting a token does not verify its meaning.

Parse each signed ordinary decimal token and count only its fractional trailing zeros.

When to use this tool

Use Trailing Zero Preservation Flag when you need the specified literal representation or text-level numeric diagnostic.

How to use the tool and how it works

Enter originalToken, formattedToken. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read originalFractionalTrailingZeros, formattedFractionalTrailingZeros, allRetained. Inspect allRetained before interpreting the associated values.

Parse each signed ordinary decimal token and count only its fractional trailing zeros. allRetained means the formatted count is at least the original count.^[1]

Input field	Meaning and units	Accepted input
originalToken	Original Token	Required. Text; maximum UTF-16 length 8192.
formattedToken	Formatted Token	Required. Text; maximum UTF-16 length 8192.

Output field	Interpretation	Returned shape
originalFractionalTrailingZeros	Original Fractional Trailing Zeros	Required. Safe integer.
formattedFractionalTrailingZeros	Formatted Fractional Trailing Zeros	Required. Safe integer.
allRetained	Only a comparison of fractional trailing-zero counts, not equality of numeric values.	Required. Boolean.

json

{
  "input": {
    "originalToken": "1.200",
    "formattedToken": "1.20"
  },
  "output": {
    "originalFractionalTrailingZeros": 2,
    "formattedFractionalTrailingZeros": 1,
    "allRetained": false
  }
}

Limitations and assumptions

The two numeric values and their significant digits are not compared. Extra zeros can pass even when the underlying value changes.
Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.

Alternative or Complementary methods

Use a locale-aware or destination-specific formatter when broader parsing and presentation rules are needed. Retain original text when lexical precision matters and validate numeric meaning separately.

References

Calculation and input contract: format/trailing-zero-preservation-flag — tool.io

Similar or alternative tools

Decimal Trailing Zero Significance Tag
Count written decimal places and fractional trailing zeros.
Formatting: Signed Zero Parenthesis Label
Remove a leading plus, retain a negative minus or replace it with parentheses, and flag a negative all-zero value.