python有趣的库pb03-var-type.rar

# 加法运算符 m = 10 n = 97 sum1 = m + n x = 7.2 y = 15.3 sum2 = x + y print("sum1 = %d, sum2 = %.2f" %(sum1, sum2)) print() ## 拼接字符串 name = "C语言中文网" url = "http://c.biancheng.net/" age = 8 info = name + "的网址是" + url + "，它已经" + str(age) + "岁了。" print(info) print() # 减法运算符 n = 45 m = -n x = -83.5 y = -x print(m, ",", y) print() ## 求负 n = 45 n_neg = -n f = -83.5 f_neg = -f print(n_neg, ",", f_neg) print() # 乘法运算符 n = 4 * 25 f = 34.5 * 2 print(n, ",", f) ## 重复字符 str1 = "hello " print(str1 * 4) print() # 除法运算符 # 整数不能除尽 print("23 / 5 = ", 23 / 5) print("23 // 5 = ", 23 // 5) print("23.0 // 5 = ", 23.0 // 5) print("----------------") # 整数能除尽 print("25 / 5 = ", 25 / 5) print("25 // 5 = ", 25 // 5) print("25.0 // 5 = ", 25.0 // 5) print("----------------") # 小数除法 print("12.4 / 3.5 = ", 12.5 / 3.5) print("12.4 // 3.5 = ", 12.4 // 3.5) print() # 求余运算符 print("--------整数求余--------") print("15 % 6 = ", 15 % 6) print("-15 % 6 = ", -15 % 6) print("15 % -6", 15 % -6) print("-15 % -6 =", -15 % -6) print("--------小数求余--------") print("7.7 % 2.2 = ", 7.7 % 2.2) print("-7.7 % 2.2 = ", -7.7 % 2.2) print("7.7 % -2.2 = ", 7.7 % -2.2) print("-7.7 % -2.2 = ", -7.7 % -2.2) print("--------整数和小数求余--------") print("23.5 % 6 = ", 23.5 % 6) print("23 % 6.5 = ", 23 % 6.5) print("23.5 % -6 = ", 23.5 % -6) print("-23 % 6.5 = ", -23 % 6.5) print("-23 % -6.5 = ", -23 % -6.5) print() # 次方（乘方）运算符 print("--------次方运算--------") print("3 ** 4 = ", 3 ** 4) print("2 ** 5 = ", 2 ** 5) print("----开方运算--------") print("81 ** (1 / 4) = ", 81 ** (1 / 4)) print("32 ** (1 / 5) = ", 32 ** (1 / 5))