一、if语句 if语句表如果，如果满足某某条件，则执行后面得代码。格式为“ if 条件: ”。需要注意的是，满足条件后执行的代码是if语句下面缩进的代码，没有缩进的代码不在if语句的体系内，无论满不满足都会执行。if statement table If, if a condition is met, the following code is executed. The format is...
if (condition) { // Code to execute if condition is true } 这里的“condition”是一个布尔表达式,当该表达式的值为真(通常是true或者非零值)时,if语句所包围的代码块(大括号{}中的部分)就会执行。如果条件为假,则跳过这部分代码不执行。 二、SYNTAX VARIATIONS 虽然if语句的逻辑结构在各种语言中通常保持一...
The Python if not statement helps users to implement logical decisions and returns thenegation value of the “if statement”. When users need to check if a particular condition is not satisfied, they can extensively use the 'if not' Python operator in two factors: In Python,notis alogical op...
By checking the value of name using theif __name__ == '__main__'condition, you can control which code is executed in different scenarios. If the condition is True, then the indented code block following the conditional statement is executed, while if it is False, the code block is ski...
Python if...else Statement Anifstatement can have an optionalelseclause. Theelsestatement executes if the condition in theifstatement evaluates toFalse. Syntax ifcondition:# body of if statementelse:# body of else statement Here, if theconditioninside theifstatement evaluates to ...
Syntax of the if statement in Python: if test expression: statement(s) As depicted by the flowchart above, the Python program first evaluates the test expression. It is basically the condition in the if statement in Python. If the condition is met or if the condition is true, then only ...
if[condition #1]: if[condition #1.1]: [statement to exec if #1 and #1.1 are true] else: [statement to exec if #1 and #1.1 are false] else: [alternate statement to execute] Needless to say you can write the same if-else block inside anelseblock too. Or in fact you can add anel...
If `condition` is a string (e.g. ‘${rc} < 10’), it is evaluated as a Python expression using the built-in ‘eval’ function and the keyword status is decided based on the result. If a non-string item is given, the status is got directly from its truth value. ...
python for item in www.dtnews.net/?p=164788&preview=true: # 执行代码块 if-else: python if condition: # 条件为真时执行的代码块 else: # 条件为假时执行的代码块 3. 执行流程 for 循环: 初始化一个迭代变量。 每次迭代时,迭代变量从可迭代对象中获取下一个值。
Python program to Check if a Substring is Present in a Given String or not and printing the result. Substring is a sequence of characters within another string