The Structure of Expressions

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expression
7
traditional form
7
type
atomic expression
head
Integer
full form
7
tree form
Everything in Mathematica is an expression. Expressions are either atomic or composite and have a head and zero or more elements. The FullForm function gives the full internal representation of an expression and the TreeForm function shows its tree structure.

Permanent Citation

Xiang Li
​
​"The Structure of Expressions"​
​http://demonstrations.wolfram.com/TheStructureOfExpressions/​
​Wolfram Demonstrations Project​
​Published: October 13, 2011