math.sqrt()方法是数学模块的库方法,用于查找给定数字的平方根,它接受正数(整数或浮点数)并返回平方根。
注意:
如果给定数字为负数,则返回“ ValueEroor” – “ ValueError:math domain error”。
如果我们提供字符串以外的任何东西,除了数字,它还会返回“ ValueError” – “ TypeError:需要浮点数”。
它的语法 math.sqrt() 方法:
math.sqrt(n)
Parameter(s): n-一个需要计算平方根的数字。
返回值: float-它返回一个浮点值,该浮点值是给定数字n的平方根。
示例
Input: a = 2 # 函数调用 print(math.sqrt(a)) Output: 1.4142135623730951
# python代码演示示例 # math.sqrt() method # 导入数学模块 import math # 数字 a = 2 b = 12345 c = 10.21 d = 0 e = 0.0 # 寻找数字的平方根 print("square root of ", a, " is = ", math.sqrt(a)) print("square root of ", b, " is = ", math.sqrt(b)) print("square root of ", c, " is = ", math.sqrt(c)) print("square root of ", d, " is = ", math.sqrt(d)) print("square root of ", e, " is = ", math.sqrt(e))
输出结果
square root of 2 is = 1.4142135623730951 square root of 12345 is = 111.1080555135405 square root of 10.21 is = 3.1953090617340916 square root of 0 is = 0.0 square root of 0.0 is = 0.0