This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)

SameQ


yields True if the expression lhs is identical to rhs, and yields False otherwise.
  • SameQ requires exact correspondence between expressions, except that it still considers Real numbers equal if they differ in their last binary digit.
  • gives True if all the are identical.
Test whether two expressions are identically the same:
remains symbolic unless literal values are given:
Full form:
Test whether two expressions are identically the same:
In[1]:=
Click for copyable input
Out[1]=
In[2]:=
Click for copyable input
Out[2]=
remains symbolic unless literal values are given:
In[3]:=
Click for copyable input
Out[3]=
 
Full form:
In[1]:=
Click for copyable input
Out[1]=
Test equivalence of strings:
Numbers in different representations are not the same:
nevertheless treats them as equal:
Approximate numbers that differ in their last bit are still considered identical:
Test whether multiple expressions are all the same:
Make a Kronecker delta (identity) tensor:
New in 1