Decimal Exponent Spelling Expander
Expand finite decimal exponent notation exactly to plain text with the explicit source scale retained.
Description
Expand finite decimal exponent notation exactly to plain text with the explicit source scale retained.
Expanding exponent notation can preserve an exact decimal value without a floating-point round trip.
When to use this tool
Expand finite decimal exponent notation exactly to plain text with the explicit source scale retained.
- Prepare the supplied decimal fields for this operation.
- Compare the complete example with the representation used by your own input before carrying the result into another step.
How to use the tool and how it works
- Enter decimal. Use the exact text syntax, units and index conventions explained below.
- Run the tool. If input validation fails, correct the supplied fields before interpreting any result.
- Read result.decimal. Interpret false, null and empty lists using the distinctions below; they can be valid outputs.
Parse the signed integer coefficient and effective scale. Insert a decimal point with leading zeros for positive scale or append zeros for negative scale.1
| Input field | Meaning and representation | Accepted input |
|---|---|---|
| decimal | decimal. | Text; at most 8,192 UTF-16 code units, subject to the grammar above |
| Output field | Interpretation |
|---|---|
| result | Object containing the named outputs below. |
| result.decimal | The decimal value under the stated formula or text convention. |
{
"input": {
"decimal": "1.23e-3"
},
"output": {
"result": {
"decimal": "0.00123"
}
}
}Limitations and assumptions
- The parser requires digits before the optional decimal point. Written plus signs and negative zero are normalized; no arbitrary-precision measurement metadata is retained.
- Exact decimal-spelling operations require digits before the optional decimal point and allow a signed exponent. Decimal text is bounded to 256 code units and effective scale to minus 256 through 256; integer-string fields allow a sign and up to 256 digits.
- Every declared top-level field is required and unexpected fields are rejected. Numeric inputs must be finite; ordinary text fields are bounded to 8,192 UTF-16 code units, with tighter operation-specific limits where stated.
- Lists are limited to 128 entries. JSON text must meet bounded size and depth checks, and numeric outputs beyond the safe finite magnitude are rejected. Exact large integers use decimal strings.
- Indexes are zero-based and spans have an exclusive end unless explicitly stated otherwise. A valid false, null or empty-list result is distinct from malformed input.
Alternative or Complementary methods
Preserve decimal and integer strings when exact comparisons matter. Select signedness, scale, rounding and overflow policies separately, and use the matching encoder/decoder rather than a floating-point approximation.
References
Similar or alternative tools
- Decimal Exponent Spelling Compactor
Compact an exact finite decimal spelling into canonical scientific notation without numeric parsing.
- Decimal Spelling Scale Aligner
Align a list of decimal spellings to a common exact coefficient scale; no precision loss or rounding.