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exists EXPR Given an expression that specifies an element of a hash, returns true if the specified element in the hash has ever been initialized

format Declare a picture format for use by the write

chr NUMBER chr Returns the character represented by that NUMBER in the character set. For example,

exp EXPR exp Returns e (the natural logarithm base) to the power of EXPR. If EXPR is omitted, gives

package NAMESPACE package NAMESPACE VERSION package NAMESPACE BLOCK package