Two definitions:

1: The part of a number after the "."

Example: in 2.71828 the mantissa is 0.71828

2: In scientific notation the mantissa is the digits without the ×10

Example: in 5.3266 × 10

1: The part of a number after the "."

Example: in 2.71828 the mantissa is 0.71828

2: In scientific notation the mantissa is the digits without the ×10

^{n}part.Example: in 5.3266 × 10

^{3}the mantissa is 5.3266See: Scientific Notation

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