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Hash Function

Usage

Hash[expr] gives an integer hash code for the expression expr.
Hash[expr, type] gives an integer hash digest of the specified type for expr.
Hash[expr, type, "format"] gives a hash code in the specified format.

Basic examples

Hash a string:
In[1]:=Hash[abcdef]
Out[1]=2013519615402292549
Digital fingerprint of data:
In[1]:=Hash[ByteArray[{123, 45, 67, 89, 98, 76, 54, 32, 1}], SHA]
Out[1]=205163851794085253373860936160163003382114085276
SHA256 hash given in hexadecimal form:
In[1]:=Hash[The quick brown fox jumps over the lazy dog, SHA256, HexString]
Out[1]=d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592

Attribute

Protected

Relationships with other entities

Relationships with other entities

Typical ranks of usage in programs

1333rd most common (1 in 195000 symbols)

1506th most common (1 in 1230000 symbols)

1829th most common (1 in 43000 symbols)

History

introduced in Version 1 (June 1988)
last modified in Version 13.1 (June 2022)

Timeline

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