Underflow of Floating-Point Values

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The latest version of this topic can be found at Underflow of Floating-Point Values.

ANSI 4.5.1** Whether the mathematics functions set the integer expression errno to the value of the macro ERANGE on underflow range errors

A floating-point underflow does not set the expression errno to ERANGE. When a value approaches zero and eventually underflows, the value is set to zero.

Library Functions