最后,我们使用print()函数打印出formatted_num的值。 完整示例 下面是一个完整的示例,演示了如何将字符串转换为浮点数并保留2位小数。 defconvert_to_float_with_2_decimal_places(s):num=float(s)formatted_num="{:.2f}".format(num)returnformatted_num# 测试s="3.14159"result=convert_to_float_with_2_de...
def round_to_two_places(value): return float(format(value, '.2f')) value = 3.14159 rounded_value = round_to_two_places(value) print(rounded_value) # 输出:3.14 自定义函数的优点是灵活,可以根据具体需求实现特定的功能,例如自定义四舍五入规则、处理特殊情况等。 六、在数据分析中的应用 在数据分...
下面是一个完整的示例,将字符串转换为两位小数数字: defconvert_to_two_decimal_places(num_str):num_float=float(num_str)formatted_num="{:.2f}".format(num_float)returnfloat(formatted_num)num_str="3.14159"result=convert_to_two_decimal_places(num_str)print(result)# 输出:3.14 1. 2. 3. 4. 5...
def retain_two_decimal_places_format(num_str): try: # 将字符串转换为浮点数 num = float(num_str) # 使用字符串格式化方法保留两位小数 result_str = "{:.2f}".format(num) return result_str except ValueError: # 如果字符串不是有效的数字,则返回错误信息 return "Error: The input string is not...
用F-String来格式化对象的打印输出 !r —表示调用repr()函数来进行将值转换成字符串!s —表示调用str()函数来进行将值转换成字符串 >>> class Color: def __init__(self, r: float = 255, g: float = 255, b: float = 255): self.r = r self.g = g self.b = b def __...
Round to 2 decimal places using the round() function The round() function is Python’s built-in function for rounding float point numbers to the specified number of decimal places. You can specify the number of decimal places to round by providing a value in the second argument. The example...
You can also specify text alignment using the greater than operator:>. For example, the expression{:>3.2f}would align the text three spaces to the right, as well as specify a float number with two decimal places. Conclusion In this article, I included an extensive guide of string data typ...
num = 3.141592653589793 decimal_places = 3 result = truncate_float(num, decimal_places) print(result) # 输出:3.141 在上述示例中,我们将浮点数3.141592653589793截断为3位小数,得到的结果为3.141。 腾讯云相关产品推荐:若您在云计算领域中需要进行浮点数截断操作,您可以考虑使用腾讯云的云函数(SCF)。云函数...
11.8. Decimal Floating Point ArithmeticThe decimal module offers a Decimal datatype for decimal floating point arithmetic. Compared to the built-in float implementation of binary floating point, the class is especially helpful forfinancial applications and other uses which require exact decimal ...
Example 2: Simple number formatting # integer arguments print("The number is:{:d}".format(123)) # float arguments print("The float number is:{:f}".format(123.4567898)) # octal, binary and hexadecimal format print("bin: {0:b}, oct: {0:o}, hex: {0:x}".format(12)) Run Code ...