Infinity (+) This is detected when operations produce positive infinity, such as 1.0 / 0.0. Infinities propagate through calculations: for example, 2 + ∞ = ∞.

Infinity (-) This is detected when operations produce negative infinity.

NaN NaN (not a number) are the result of invalid operations, such as 0/0 or sqrt(-1).

Division by zero This occurs when a finite nonzero number is divided by zero. This typically produce an infinity.

Underflow (subnormal) Underflows are detected when an operation produces a subnormal number because the result was not representable as a normal number. Certain compiler optimizations can produce unexpected results when operands are subnormal numbers.

Comparison This occurs when two floating-point numbers are compared for equality. Often comparing if two floating-point numbers are equal is not a good idea.

Cancellation Cancellation occurs when two nearly equal numbers are subtracted. By default, this event is detected when at least ten decimal digits are lost due to a subtraction.

Latent Infinity (+) This is detected when an operation produces a normal number that is large, and it is in close proximity to positive infinity.

Latent Infinity (-) This is detected when an operation produces a normal number that is large, and it is in close proximity to negative infinity.

Latent underflow This is detected when an operation produces a normal number that is small and it is in close proximity to becoming an underflow (subnormal number).