# mantissa

## Definitions

### Computing

### Electronics

- The decimal part of a logarithm. The integer portion is the characteristic (3). For example, if a logarithm of a given number equals 1.2345, the mantissa is .2345, while 1 is the characteristic.
- In a floating-
__point__ number, the first part, which specifies the significant digits, and which usually has a value equal to or greater than 1, but less than 10. For example, in 1.234 × 10^{56}, 1.234. The __power__ to which the base is raised, 56, is the characteristic (2).

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