Decimal128
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What is Decimal128?
Decimal128 data type in MongoDB provides exact decimal representation for financial and monetary calculations requiring precision. Based on IEEE 754-2008 standard, it supports 34 decimal digits with exact arithmetic operations. Decimal128 eliminates floating-point precision errors, making it essential for applications handling currency, accounting, and scientific computations where decimal accuracy is critical.
Free resources to learn Decimal128
- Official docsData Types
- Articledecimal128
More in stage 3: Collections & Methods
- Collections & Methods
- Counting Documents
- insert() and relevant
- find() and relevant
- update() and relevant
- delete() and relevant
- bulkWrite() and relevant
- validate()
- BSON vs JSON
- Embedded Objects & Arrays
- Double
- String
- Array
- Object
- Binary Data
- Undefined
- Object ID
- Boolean
- Date
- Null
- Regular Expression
- JavaScript
- Symbol
- Int64 / Long
- Int32/Int
- Timestamp
- Min Key
- Max Key
Decimal128: common questions
Can I learn Decimal128 in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Decimal128 in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Decimal128 tutorial for beginners?
It is lesson 34 of 106 in the free MongoDB roadmap, in stage 3, Collections & Methods. If you are new to MongoDB, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.