If all the if conditions turn out to be false, then the body of the last else block is executed. The following flowchart depicts the working of if elif else statements: Syntax of the if elif else in Python if test expression: Body of if elif test expression: Body of elif else: Body ...
ifTrue:#此句会运行print("True1")#此句会运行print("True2")#此句会运行else:print("Else1")print("Else2")ifTrue:#此句会运行print("True1")#此句会运行print("True2")#此句会运行else:print("Else1")print("Else2")#此句会运行 多个语句构成代码组 compoundstatements 缩进相同的一组语句构成一...
Python Nested if Statements It is possible to include anifstatement inside anotherifstatement. For example, number =5# outer if statementifnumber >=0:# inner if statementifnumber ==0:print('Number is 0')# inner else statementelse:print('Number is positive')# outer else statementelse:print(...
Python has a clean and readable syntax, with proper indentation and a line structure. The syntax rules must be followed to produce a program that works correctly. Now, we will look at Python’s line structure, multiline statements, indentation, and also the rules involved in using comments ...
2024刚刚开始学习 Python 时，掌握以下必备的英文单词将非常有帮助：Syntax- 语法Variable- 变量Function- ...
if True: # 此句会运行 print ("True1") # 此句会运行 print ("True2") # 此句会运行 else: print ("Else1") print ("Else2") # 此句会运行 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 多个语句构成代码组 compoundstatements ...
>>> test = 'test' >>> _a_ = 1 >>> 123c = 10 File "<stdin>", line 1 123c = 10 ^ SyntaxError: invalid syntax >>> 这里Python解释器返回了SyntaxError: invalid syntax这个无效语法的错误提示,告诉你123c为无效的变量名。这也是使用解释器来学习Python的优势,代码里出了任何问题你都能得到“即时...
复制 for char in name: print(char) j a s o n 特别要注意,Python的字符串是不可变的(immutable)。因此,用下面的操作,来改变一个字符串内部的字符是错误的,不允许的。 代码语言:javascript 代码运行次数:0 运行 复制 s = 'hello' s[0] = 'H' Traceback (most recent call last): File "<stdin...
在Python 中,条件语句又叫作判断语句,由 if、 elif和 else 3 种语句组成,其中 if 为强制语句,可以独立使用,elif 和 else 为可选语句,并且不能独立使用。 判断语句配合布尔值,通过判断一条或多条语句的条件是否成立(True 或者 False),从而决定下一步的动作,如果判断条件成立(True),则执行 if 或 elif 语句下...
The Python SyntaxError: invalid syntax is often caused when we use a single equals sign instead of double equals in an if statement.