方法1:使用format函数 python number = 3.14159 formatted_number = "{:.2f}".format(number) print(formatted_number) # 输出: 3.14 ### 方法2:使用`f-string`(Python 3.6+) ```python filename="fstring_two_decimal_places.py" number = 3.14159 formatted_number = f"{number:.2f}" print(formatted...
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...
1. 2. 3. 使用f-string num=3.1415926formatted_num=f"{num:.2f}"print(formatted_num)# 输出 3.14 1. 2. 3. 全局保持两位数 有时候我们希望在整个程序中都保持数字的格式为两位小数。这时可以自定义一个函数或者类来实现全局保持两位数的功能。 defkeep_two_decimal_places(num):return"{:.2f}".format(...
❮ String Methods ExampleGet your own Python Server Insert the price inside the placeholder, the price should be in fixed point, two-decimal format: txt ="For only {price:.2f} dollars!" print(txt.format(price =49)) Try it Yourself » ...
Learn how to round a number to 2 decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques.
two decimal places: {:.2f}".format(pi) print(formatted_string) # 输出: Pi to two decimal places: 3.14 # 数字右对齐,总宽度为10个字符,并用0填充空位 number = 42 formatted_string = "Right aligned number: {:>10d}".format(number) print(formatted_string) # 输出: Right aligned number: 42...
# It converts the string '3.14159' to a Decimal object. decimal_ = Decimal('3.14159') print('四舍五入保留4位小数:{0}'.format(decimal_.quantize(Decimal('0.0000'))) # 四舍五入保留4位小数:3.1416 将3.14159通过四舍五入的方式保留4位小数之后就变成了3.1416,和我们预想的结果一样。 到...
Format the price to be displayed as a number with two decimals: txt ="The price is {:.2f} dollars" Try it Yourself » Check out all formatting types in ourString format() Reference. Multiple Values If you want to use more values, just add more values to the format() method: ...
In this example, note that each replacement field contains a string that starts with a colon. That’s a format specifier. The .2f part tells Python that you want to format the value as a floating-point number (f) with two decimal places (.2). Note: To learn more about the formatting...
Python提供了多种字符串格式化的方法,其中最简单的就是使用format()函数或f-string。 defformat_to_two_decimal_places(value):try:# 转换为浮点数float_value=float(value)# 使用字符串格式化formatted_value="{:.2f}".format(float_value)returnformatted_valueexceptValueError:return"输入无效,请输入有效的数字。