Recognised as Decimal number
2.1
- Positive
- Decimal
- 1 d.p.
- Exact fraction
- 2 s.f.
2.1 is a decimal number equal to 21⁄10. It lies between 2 and 3, and as a percentage it is 210%.
Number properties
Fractions & ratios
Arithmetic
Representations
Decimal2.1
Scientific notation2.1 × 10^0
Exponential2.1e+0
IEEE 754 binary64 (hex)0x4000CCCCCCCCCCCDthe exact 64-bit pattern stored
IEEE 754 binary32 (hex)0x4006666632-bit single precision, may lose accuracy
Stored as2.1the nearest binary64 value to what you typed
Rounding & precision
Significant figures as written2counted from the digits as typed, not from the value
To 0 decimal places2
To 1 decimal place2.1
To 2 decimal places2.10
To 3 decimal places2.100
To 4 decimal places2.1000
To 1 significant figure2
To 2 significant figures2.1
To 3 significant figures2.10
To 4 significant figures2.100
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