This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.

# DeleteCases

 DeleteCasesremoves all elements of expr that match pattern. DeleteCasesremoves all parts of expr on levels specified by levelspec that match pattern. DeleteCasesremoves the first n parts of expr that match pattern.
• With the option Heads->True, you can delete heads with DeleteCases. Deleting the head of a particular element in an expression is equivalent to applying FlattenAt to the expression at that point.
 n levels through n Infinity levels through Infinity {n} level n only {n1,n2} levels through
• A positive level n consists of all parts of expr specified by n indices.
• A negative level -n consists of all parts of expr with depth n.
• Level consists of numbers, symbols, and other objects that do not have subparts.
• Level corresponds to the whole expression.
• DeleteCases traverses the parts of expr in a depth-first order, with leaves visited before roots.
Delete cases that match integers:
Delete cases that match integers:
 Out[1]=
 Options   (1)