This tutorial will take you through writing conditional statements in the Python programming language. If statement We will start with the if statement, which will evaluate whether a statement is true or false, and run code only in the case that the statement is true. An ifelse statement executes one set of statements when the condition is true and a different set of statements when the condition is false. In this way, a ifelse statement allows us to follow two courses of action.
Simple Conditions. The statements introduced in this chapter will involve tests or conditions. More syntax for conditions will be introduced later, but for now consider simple arithmetic comparisons that directly translate from math into Python. In the heart of programming logic, we have the if statement in Python. The if statement is a conditional that, when it is satisfied, activates some part of code. The if statement is a conditional that, when it is satisfied, activates some part of code.
An important part of coding in Python is learning to express conditional logic. Python has a class designated specifically for this called Boolean. In this tutorial, well cover the basics of the Boolean class and show you what role it plays in developing important coding tools, such as if, else, and elif statements.
Statements are the smallest, This reference manual describes the syntax and core semantics of the language. It is terse, but attempts to be exact and complete. The semantics of nonessential builtin object types and of the builtin functions and modules are described in The Python Standard Library. Automate the Boring Stuff with Python Programming; If statements. Consider this application, it executes either the first or second code depending on the value of x.
I am new to python and just learning the syntax. (I am experienced in other languages). What is the syntax if I want more than one line of code between if: and else:and Python if elif else: Python if statement is same as it is with other programming languages. It executes a set of statements conditionally, based on the value of a logical expression.
Also read if else, if elif else. 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. # ! usrbinpython var 100 if var 200: print" 1 Got a true expression value" print var elif var 150: print" 2 Got a true expression value Python if Statement Syntax if test expression: statement(s) Here, the program evaluates the test expression and will execute statement(s) only if the text expression is True.
If the text expression is False, the statement(s) is not executed. Python if statements are very commonly used to handle conditions. If you learn data coding, here's an article to learn the concept and the syntax!