For an operation of the form x
*
y
, binary operator overload resolution (§7.2.4) is applied to select a specific operator implementation. The operands are converted to the parameter types of the selected operator, and the type of the result is the return type of the operator.
The predefined multiplication operators are listed below. The operators all compute the product of x
and y
.
int operator *(int x, int y); uint operator *(uint x, uint y); long operator *(long x, long y); ulong operator *(ulong x, ulong y);
In a checked
context, if the product is outside the range of the result type, an OverflowException
is thrown. In an unchecked
context, overflows are not reported and any significant high-order bits of the result are discarded.
float operator *(float x, float y); double operator *(double x, double y);
The product is computed according to the rules of IEEE 754 arithmetic. The following table lists the results of all possible combinations of nonzero finite values, zeros, infinities, and NaNs. In the table, x
and y
are positive finite values. z
is the result of x
*
y
. If the result is too large for the destination type, z
is infinity. If the result is too small for the destination type, z
is zero.
+y |
y |
+0 |
0 |
+8 |
8 |
NaN |
|
+x |
z |
z |
+0 |
0 |
+8 |
8 |
NaN |
x |
z |
z |
0 |
+0 |
8 |
+8 |
NaN |
+0 |
+0 |
0 |
+0 |
0 |
NaN |
NaN |
NaN |
0 |
0 |
+0 |
0 |
+0 |
NaN |
NaN |
NaN |
+8 |
+8 |
8 |
NaN |
NaN |
+8 |
8 |
NaN |
8 |
8 |
+8 |
NaN |
NaN |
8 |
+8 |
NaN |
NaN |
NaN |
NaN |
NaN |
NaN |
NaN |
NaN |
NaN |
decimal operator *(decimal x, decimal y);
If the resulting value is too large to represent in the decimal
format, an OverflowException
is thrown. If the result value is too small to represent in the decimal
format, the result is zero.