python –m pydoc raw_input. Python interprets non-zero values as True. Next Steps. But Python 2 also has a function called input(). Python Version Note: Should you find yourself working with Python 2.x code, you might bump into a slight difference in the input functions between Python versions 2 and 3. raw_input() in Python 2 reads input from the keyboard and returns it.raw_input() in Python 2 behaves just like input() in Python 3, as described above. After entering the value from the keyboard, we have to press the “Enter” button.

You now know the basics of if-else statements in Python. These functions have an optional parameter, commonly known as prompt , which is a string that will be printed on the screen whenever the function is called. size is an optional numeric argument. The inbuilt raw_input()(Python 2) or input()(python3) function, consider the input u give in the console as a string.
In this example the variable x is assigned to -x only if x < 0.In contrast, the instruction print(x) is executed every time, because it's not indented, so it doesn't belong to the 'true' block.. Indentation is a general way in Python to separate blocks of code. In a simple word, the program can read the line form console, which entered by users. As you an see, you get an extra result, depending on the input. 3.1.2. The main code is: All instructions within the same block should be indented in the same way, i.e. the prompt, will be printed on the screen is optional. Simple if Statements¶ Run this example program, suitcase.py. In Python, the body of the if statement is indicated by the indentation. In this tutorial, you will learn about input …

Python if Statement Flowchart Flowchart of if statement in Python programming Example: Python if Statement None and 0 are interpreted as False. The elif statement allows you to check multiple expressions for TRUE and execute a block of code as soon as one of the conditions evaluates to TRUE. To read a file’s contents, call f.read(size), which reads some quantity of data and returns it as a string. With the input function, we can read string and integer (Numbers) data type in python. Python input function allows to user pass content in the program. Try it at least twice, with inputs: 30 and then 55. Python Tutorial for Beginners 6: Conditionals and Booleans - If, Else, and Elif Statements - Duration: 16:28. Corey Schafer 243,566 views The result: But if this is too technical for you (and it is a little technical), head over to websites like Stackoverflow to seek answers, or simply Google your command. Methods of File Objects¶. ; The text or message display on the output screen to ask a user to enter input value is optional i.e. To receive information through the keyboard, Python uses either the input() or raw_input() functions (more about the difference between the two in the following section). Output: How the input function works in Python : When input() function executes program flow will be stopped until the user has given an input. Python input() 函数 Python 内置函数 Python3.x 中 input() 函数接受一个标准输入数据，返回为 string 类型。 Python2.x 中 input() 相等于 eval(raw_input(prompt)) ，用来获取控制台的输入。 raw_input() 将所有输入作为字符串看待，返回字符串类型。而 input() 在对待纯数字输入时具有自己的特性，它返回所输入 … Python user input from the keyboard can be read using the input() built-in function. The body starts with an indentation and the first unindented line marks the end. The input from the user is read as a string and can be assigned to a variable. The rest of the examples in this section will assume that a file object called f has already been created. Irrespective of what python version ur using.

7.2.1.