loop forever
In most computer programming languages, a while loop is a control flow statement that allows code to be executed repeatedly based on a given boolean condition. The boolean condition is either true or false. while(1) It is an infinite loop which will run till a break statement is issued explicitly.
In Python, While Loops is used to execute a block of statements repeatedly until a given condition is satisfied. And when the condition becomes false, the line immediately after the loop in the program is executed.
9. A while loop checks the condition (well, the expression) behind the while before each iteration and stops executing the loop body when the condition is False . So while False means that the loop body will never execute.
The break statement in Python terminates the current loop and resumes execution at the next statement, just like the traditional break found in C. The most common use for break is when some external condition is triggered requiring a hasty exit from a loop. The break statement can be used in both while and for loops.
addition and assignment into one
+= adds a number to a variable, changing the variable itself in the process (whereas + would not). Similar to this, there are the following that also modifies the variable: -= , subtracts a value from variable, setting the variable to the result. *= , multiplies the variable and a value, making the outcome the variable.
It means not equal to. It was taken from ABC (python's predecessor) see here: x < y, x = y, x > y, x = y, x y, 0
In Python, you can increase the value of a variable by 1 or reduce it by 1 using the augmented assignment operators. The code spam += 1 and spam -= 1 increments and decrements the numeric values in spam by 1 , respectively.
The python != ( not equal operator ) return True, if the values of the two Python operands given on each side of the operator are not equal, otherwise false . ... So if the two variables have the same values but they are of different type, then not equal operator will return True.
An "if statement" is written by using the if keyword....Python supports the usual logical conditions from mathematics:
The Python return statement is a special statement that you can use inside a function or method to send the function's result back to the caller. A return statement consists of the return keyword followed by an optional return value. The return value of a Python function can be any Python object.
A function can produce a value with the return statement, which will exit a function and optionally pass an expression back to the caller. If you use a return statement with no arguments, the function will return None . So far, we have used the print() statement instead of the return statement in our functions.
You can return multiple values from a function in Python. To do so, return a data structure that contains multiple values, like a list containing the number of miles to run each week. Data structures in Python are used to store collections of data, which can be returned from functions.
The id() function returns a unique id for the specified object. All objects in Python has its own unique id. The id is assigned to the object when it is created.
There's a subtle difference between the Python identity operator ( is ) and the equality operator ( == ). The == operator compares the value or equality of two objects, whereas the Python is operator checks whether two variables point to the same object in memory. ...
Python type() The type() function either returns the type of the object or returns a new type object based on the arguments passed. The type() function has two different forms: type(object) type(name, bases, dict)
Basic Data Types in Python
Common data types include:
Features in Python
Python Data Types
Python includes three numeric types to represent numbers: integers, float, and complex number.
Numeric Types — int , float , complex. There are three distinct numeric types: integers, floating point numbers, and complex numbers. In addition, Booleans are a subtype of integers.
Namespaces in Python. A namespace is a collection of currently defined symbolic names along with information about the object that each name references. You can think of a namespace as a dictionary in which the keys are the object names and the values are the objects themselves.
Scope of Python: Python programming language, to be the most promising career in technologies, industry. Opportunities in the career of python are increasing tremendously in the world. Since Python has simple codes, faster readability capacity, significant companies are in demand in python language.
Python Main Function & Method Example: Understand __main__ Python main function is a starting point of any program. When the program is run, the python interpreter runs the code sequentially. Main function is executed only when it is run as a Python program. It will not run the main function if it imported as a module.
A namespace is a declarative region that provides a scope to the identifiers (names of the types, function, variables etc) inside it. Multiple namespace blocks with the same name are allowed. All declarations within those blocks are declared in the named scope.