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Mathematica Teacher's Edition

Built-in Functions

Programming

Tests

Less

x < y yields True if x is determined to be less than y.
< < yields True if the form a strictly increasing sequence.

Less gives True or False when its arguments are real numbers.
Less does some simplification when its arguments are not numbers.
For exact numeric quantities, Less internally uses numerical approximations to establish numerical ordering.
See The Mathematica Book on the web: Section 1.5.6.
See also: LessEqual, Greater, Positive, Element.

Further Examples