Python函数中三大主要应用形式
Python函数在使用的时候有几大分类,其中以int函数,float函数和str函数的应用最为广泛。下面我们就看看具体的环境中如何进行相关的函数代码的编写。下面我们先来看看int函数在Python函数中的作用。
(1)把符合数学格式的数字型字符串转换成整数
(2)把浮点数转换成整数,但是只是简单的取整,而非四舍五入。
举例:
aa = int("124") #Correct print "aa = ", aa #result=124 bb = int(123.45) #correct print "bb = ", bb #result=123 cc = int("-123.45") #Error,Can't Convert to int print "cc = ",cc dd = int("34a") #Error,Can't Convert to int print "dd = ",dd ee = int("12.3") #Error,Can't Convert to int print ee
float函数将整数和字符串转换成浮点数。
举例:
aa = float("124") #Correct print "aa = ", aa #result = 124.0 bb = float("123.45") #Correct print "bb = ", bb #result = 123.45 cc = float(-123.6) #Correct print "cc = ",cc #result = -123.6 dd = float("-123.34") #Correct print "dd = ",dd #result = -123.34 ee = float('123v') #Error,Can't Convert to float print ee
Python str函数将数字转换成字符举例:
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