Learn how to round a number to 2 decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques.
在Python中,我们可以使用内置的round()函数来截断浮点数后面的小数。不进行舍入的方法是将小数部分与整数部分相加后取整数部分,可以使用math模块中的floor()函数或者int()函数来实现。下面是完整的答案: 在Python中,要截断浮点数后面的小数而不进行舍入,可以使用内置的round()函数。round()函数可以接受两个参数,...
通常使用 decimal 的方式是先导入该模块,通过 getcontext() 查看当前上下文,并在必要时为精度、舍入或启用的陷阱设置新值: >>> from decimal import * >>> getcontext() Context(prec=28, rounding=ROUND_HALF_EVEN, Emin=-999999, Emax=999999, capitals=1, clamp=0, flags=[], traps=[InvalidOperation,...
对于输出的字符串,我们很多方法控制字符串的格式,如果你的python版本>=3.6,那么强烈推荐f字符串(f-string)。...f-字符串(f-string) 基础使用: f'something{var}' 在普通字符串开头加上f,然后字符串内部 可以用{var}标记,{var}会被替换成变量的值。...:.长度f控制浮点数小数点后面位数: n...
Displaying numbers to a user requires inserting numbers into a string. You can do this with f-strings by surrounding a variable assigned to a number with curly braces: Python >>> n = 7.125 >>> f"The value of n is {n}" 'The value of n is 7.125' Those curly braces support a ...
Method 4: Using the round() Theround()function returns the floating-point number rounded off to the given digits after the decimal point. It’s important to note that, if you want a string representation, you must convert it. # Define a floating-point valuevalue=123.45678formatted_value=roun...
format_string("%s%.*f", (conv['currency_symbol'], ... conv['frac_digits'], x), grouping=True) '$1,234,567.80' 11.2. TemplatingThe string module includes a versatile Template class with a simplified syntax suitable for editing by end-users. This allows users to customize their ...
Round to specified Decimals using format() Function: Python Code: # Define the order amount as a floating-point number.order_amt=212.374# Print the total order amount with 6 decimal places using format.print("\nThe total order amount comes to {:0.6f}".format(order_amt))# Print the tota...
quantize(Decimal('1.'), rounding=ROUND_UP) Decimal('8') 如上所示,getcontext() 函数访问当前上下文并允许更改设置。 这种方法满足大多数应用程序的需求。 对于更高级的工作,使用 Context() 构造函数创建备用上下文可能很有用。 要使用备用活动,请使用 setcontext() 函数。 根据标准,decimal 模块提供了两个...
because when the decimal string 2.675 is converted to a binary floating-point number, it’s aga...