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Python的math库常用函数介绍
11 2024-10-26
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文章来源:
Python学习杂记
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Python Math Library Overview
The math
library in Python contains a variety of mathematical functions designed to solve different mathematical problems. This article presents commonly used functions from the math
library, accompanied by example cases for educational purposes.
Mathematical Functions and Examples
-
Absolute Value:
math.fabs(num)
returns the absolute value of a number. For instance,math.fabs(-5)
yields5.0
. -
Ceiling:
math.ceil(num)
rounds a number up to the nearest integer. Example:math.ceil(4.7)
results in5
. -
Square Root:
math.sqrt(num)
calculates the square root of a number, such asmath.sqrt(9)
producing3.0
. -
Floor:
math.floor(num)
rounds a number down to the nearest integer, as seen withmath.floor(4.7)
which gives4
. -
Power:
math.pow(base, exponent)
performs exponentiation. For example,math.pow(2, 3)
equals8.0
. -
Logarithm:
math.log(num)
calculates the natural logarithm of a number.math.log(10)
returns2.302585092994046
. -
Factorial:
math.factorial(num)
computes the factorial of an integer, withmath.factorial(5)
equating to120
. -
Sine:
math.sin(radians)
calculates the sine of an angle in radians. For example,math.sin(math.pi / 2)
is1.0
. -
Cosine:
math.cos(radians)
calculates the cosine, andmath.cos(math.pi / 2)
is approximately0
. -
Tangent:
math.tan(radians)
returns the tangent of an angle.math.tan(math.pi / 4)
equals1.0
. -
Modulo:
math.fmod(a, b)
provides the remainder of a division. -
Greatest Common Divisor:
math.gcd(a, b)
finds the largest number that divides both integers without leaving a remainder. -
Exponential:
math.exp(x)
calculates e raised to the power of x, where e is the base of natural logarithms. -
Fractional and Integer Parts:
math.modf(value)
breaks a number into its fractional and integer parts.
Mastering these common functions from the math
library can significantly enhance programming efficiency.
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查看原文:Python的math库常用函数介绍
文章来源:
Python学习杂记
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