在这个示例中,我们首先创建了一个包含1到10的数字列表numbers,然后使用for循环遍历该列表,并将每个数字的平方添加到新的列表squared_numbers中。最后,我们打印出squared_numbers的结果,即每个数字的平方。 流程图 下面是一个表示上述操作流程的流程图: StartCreateListForLoopAddToNewListEnd 以上流程图展示了整个操作的...
方法一:使用for循环 我们可以简单地使用for循环来实现这一过程: # 原始整数列表numbers=[1,2,3,4,5]# 存储平方数的列表squares=[]# 使用 for 循环计算平方fornuminnumbers:squares.append(num**2)print(squares)# 输出: [1, 4, 9, 16, 25] 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 上述代...
1importnumpy as np2myarray=np.array(mylist)3myarray 6- Use a “for loop” to find the maximum value in “mylist” 1maxvalue =mylist[0]2foriinrange(len_mylist):3ifmaxvalue <mylist[i]:4maxvalue =mylist[i]5print('The maximum value is', maxvalue) 7- Use a “for loop” to ...
for i in range(len(thislist)): print(thislist[i]) Try it Yourself » The iterable created in the example above is [0, 1, 2].Using a While LoopYou can loop through the list items by using a while loop.Use the len() function to determine the length of the list, then start ...
# 定义列表the_count=[1,2,3,4,5]fruits=['apples','oranges','pears','apricots']change=[1,'pennies',2,'dimes',3,'quarters']# 列表内可以同时放入数字和字符串# this first kind of for-loop goes through a list# 把 the_count 列表内的每一个元素代入变量 number ,然后打印字符串fornumberin...
Python for loop last modified January 29, 2024 Python list loop shows how to iterate over lists in Python. Python loop definition Aloopis a sequence of instructions that is continually repeated until a certain condition is reached. For instance, we have a collection of items and we create a...
python:list操作 1、list增加元素:append(增加内容),在列表末端增加元素 lst = ['liming',[1,2,3],'xiaoli'] lst.append('nihao') print(lst) 2、list插入元素: (1)、insert(插入位置,插入内容),插入位置为元素实际所在位置 lst = ['liming',[1,2,3],'xiaoli']...
Print each fruit in a fruit list: fruits = ["apple","banana","cherry"] forxinfruits: print(x) Try it Yourself » Theforloop does not require an indexing variable to set beforehand. Looping Through a String Even strings are iterable objects, they contain a sequence of characters: ...
for i in range(10): print(i) # 其他语言可能需要更繁琐的语法实现相同功能1.1.2 动态类型与高级数据结构 Python采用动态类型系统,变量无需预先声明类型,这极大地提升了开发效率。同时,Python内置了丰富的数据结构,如列表、元组、字典和集合,它们都具有高效的操作性能。例如: ...
while的代码test1.py: i = 0 while i < 10000000: i += 1 for-loop的代码test2.py: for n in range(0,10000000):...pass time python test1.py 或者test2.py,得到第一个的时间大概是0m1.189s;第二个的时间是0m0.514s。...while循环的时间大概是for-range的两倍。 其实如果对python字节码的...