pi = 3.1415926535 print(f"Pi rounded to 2 decimal places: {pi:.2f}") 四、其他格式化方式 百分号格式化:这是Python中最古老的字符串格式化方法,类似于C语言的printf。使用%作为占位符。 name = "Alice" age = 30 print("Name: %s, Age: %d" % (name, age)) 模板字符串:通过string.Template类实现...
print(f"Pi to three decimal places: {pi:.3f}") 这个语句会输出“Pi to three decimal places: 3.142”。 三、使用字符串连接 你可以使用加号+来连接多个字符串: name = "Alice" age = 30 print("Name: " + name + ", Age: " + str(age)) 这个语句会输出“Name: Alice, Age: 30”。 1、...
%操作符是Python中最古老的字符串格式化方法,它模仿了C语言中的printf函数。这种方法通过在字符串中指定格式占位符(如%s、%d等),并在字符串后使用%操作符和元组(或字典,在%后使用字典的键作为占位符)来替换这些占位符。 示例代码: python name = "Alice" age = 30 salary = 5000 # 使用元组 context1 = "...
Note: Formatting with the modulo operator is inspired by printf() formatting used in C and many other programming languages.Even though the % operator provides a quick way to interpolate and format strings, it has a few issues that lead to common errors. For example, it’s difficult to ...
For a quick example, here’s how you can format the π constant using four decimal places: Python >>> import math >>> math.pi 3.141592653589793 >>> f"{math.pi:.4f}" '3.1416' >>> "{pi:.4f}".format(pi=math.pi) '3.1416' Formatting interpolated values using the formatting mini-...
类似于 C/C++ 的printf,Python 的print也能实现格式化输出,方法是使用%操作符,它会将左边的字符串当做格式字符串,将右边的参数代入格式字符串: print("100 + 200 = %d"%300)#左边的%d被替换成右边的300print("A的小写是%s"%"a")#左边的%s被替换成右边的a ...
(as it would with %f)... Unless you need the hexadecimal outputs, you gotta use round() to limit the precision before formatting, or obv just adjust the formatting you have according to what you want output. If you're trying to format floating-point numbers with decimal places, use %f ...
Each element in the matrix should be approximated to 2 decimal places and right justified in a field of width 8. Separate the output of each two consecutive test cases by an empty line. Do not print an empty line after the last test case. It is guaranteed that there is exactly one ...
输出:Your program prints a single real number to two decimal places: the minimum total length of ink lines that can connect all the freckles. 样例输入: 3 1.0 1.0 2.0 2.0 2.0 4.0 1 2 3 4 5 样例输出: 3.41 1. 2. 3. 4. 5.
print(f"Pi rounded to 2 decimal places: {pi:.2f}") 在上面的例子中,{pi:.2f}表示将pi格式化为保留2位小数的浮点数。 六、在f-string中使用lambda表达式 我们可以在f-string中使用简单的lambda表达式来进行一些即时计算。 x = 5 y = 10 print(f"The sum of {x} and {y} is {(lambda a, b:...