Math expm1
(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
expm1 — exp(number) - 1을 반환합니다. number 값이 0에 가까울 때도 정확한 방식으로 계산됩니다.
설명
expm1(float $num): float
expm1() returns the equivalent to 'exp(num) - 1' computed in a way that is accurate even if the value of num is near zero, a case where 'exp (num) - 1' would be inaccurate due to subtraction of two numbers that are nearly equal.
매개변수
num- 처리할 인수
반환 값
'e' to the power of num minus one