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Mathematica Teacher's Edition

Built-in Functions

Mathematical Functions

Numerical Functions

Chop

Chop[expr] replaces approximate real numbers in expr that are close to zero by the exact integer 0.

Chop[expr, delta] replaces numbers smaller in absolute magnitude than delta by 0.
Chop uses a default tolerance of .
Chop works on both Real and Complex numbers.
See The Mathematica Book on the web: Section 3.1.4.
See also: Rationalize, Round.

Further Examples