Pythonforstatement iterates over the items of any sequence (such as a list or a string), in the order that they appear in the sequence. for var in sequence: do_statement(s) The above is the general syntax of the Pythonforstatement. Python for loop with string The following example uses...
In computer science, afor-loop(or simplyfor loop) is a control flow statement for specifying iteration, which allows code to be executed repeatedly。(作用:介绍了for循环是什么?) A for-loop has two parts: a header specifying the iteration, and a body which is executed once per iteration. (...
We can use break statement to terminate the for loop if an odd number is present. We can print the sum in the else part so that it gets printed only when the for loop is executed normally. defprint_sum_even_nums(even_nums):total=0forxineven_nums:ifx%2!=0:breaktotal+=xelse:print...
在很多的高级语言中都有for循环(for loop)。for语句是编程语言中针对可迭代对象的语句,它的主要作用是允许代码被重复执行。看一段来自维基百科的介绍: Incomputer science, afor-loop(or simplyfor loop) is acontrol flowstatementfor specifyingiteration, which allows code to beexecutedrepeatedly。(作用:介绍了f...
循环语句的执行流程是:先判断执行条件condition,当条件满足时,执行需要重复的代码描述statement,执行完statement后,再判断condition是否为true,不断的循环,直到condition结果为false,则停止执行或执行更进一步的脚本代码。 ●for循环语句 for循环的格式: for in : ...
循环语句 loop statement 两种 循环语句: while 语句 for 语句 问题: 写一个程序,输入一个整数n,打印如下内容 这是第 1 行 这是第 2 行 这是第 3 行 ... 这是第 n 行 如何让一条语句或多条语句重复执行多次?如果i是一个变量 print("这是第",i,"行") ...
# Loop statement # --- loop_stmt[stmt_ty]: | 'loop' &&':' b=block { _PyAST_Loop(b, EXTRA) } gram文件描述了python的语法,编译器会根据该文件生成对应的语法分析器(Parser)。程序员在编写Python代码时,编译器会以此来检查写下的Python代码是否有语法错误。 Python的gram文件遵循...
for语句实际上解决的是循环问题。在很多的高级语言中都有for循环(for loop)。 for语句是编程语言中针对可迭代对象的语句,它的主要作用是允许代码被重复执行。看一段来自维基百科的介绍: Incomputer science, afor-loop(or simplyfor loop) is acontrol flowstatementfor specifyingiteration, which allows code to ...
languages = ['Swift', 'Python', 'Go'] # start of the loop for lang in languages: print(lang) print('---') # end of the for loop print('Last statement') Run Code Output Swift --- Python --- Go --- Last statement Here, print('Last statement') is outside the body of the...
for i in range(3): if i == 2: break print(i, end=' ') # 打印0和1 else: print("Loop completed without encountering a 'break' statement.")5.循环控制语句：range()函数：生成一个起始默认为0的序列，通常与for循环一起使用。def print_numbers(n): for i in range(1, n+1): print(i)...