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Diffstat (limited to 'system/doc/reference_manual/expressions.xml')
| -rw-r--r-- | system/doc/reference_manual/expressions.xml | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/system/doc/reference_manual/expressions.xml b/system/doc/reference_manual/expressions.xml index 644896cd7f..c24b1110a4 100644 --- a/system/doc/reference_manual/expressions.xml +++ b/system/doc/reference_manual/expressions.xml @@ -561,11 +561,15 @@ number < atom < reference < fun < port < pid < tuple < list <p>Lists are compared element by element. Tuples are ordered by size, two tuples with the same size are compared element by element.</p> - <p>If one of the compared terms is an integer and the other a - float, the integer is first converted into a float, unless the - operator is one of =:= and =/=. If the integer is too big to fit - in a float no conversion is done, but the order is determined by - inspecting the sign of the numbers.</p> + <p>When comparing an integer to a float, the term with the lesser + precision will be converted into the other term's type, unless the + operator is one of =:= and =/=. A float is more precise than + an integer until all significant figures of the float are to the left of + the decimal point. This happens when the float is larger/smaller then + +/-9007199254740992.0. The conversion strategy is changed + depending on the size of the float because otherwise comparison of large + floats and integers would loose their transitivity.</p> + <p>Returns the Boolean value of the expression, <c>true</c> or <c>false</c>.</p> <p>Examples:</p> |