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Yes, In C++ both const and volatile keywords can be applied together in a variable. But it is used in situations like a read-only hardware register, or an output of another thread. In C++, they both are type qualifiers, which are used for different purposes in programming. In this article we will see the use of both keywords in C++. const Keyword The const keyword is used to declare the value of a variable as constant, meaning its value cannot be changed or modified later once initialized with const keyword. Example In this example PI value is set as constant ... Read More
There's no such keyword in C++. A list of C++ keywords can be found in section 2.11/1 of the C++ language standard. It is a keyword in the C99 version of the C language and not in C++. In C, A restrict qualified pointer (or reference) is basically a promise to the compiler that, within the scope of the pointer, the target of the pointer will only be accessed through that restrict qualified pointer (and pointers copied from it). C++ compilers also support this definition for optimization purposes, but it is not a part of the official language specification. ... Read More
In C++, variables can be declared as global or local depending on the scope of their declaration. Local variables are declared inside functions or blocks whereas global variables are declared outside all functions. Therefore their initialization behaviour also differs. In this article we will learn their different initialization behaviour in detail. Local Variable Initialization Local variables are the variables, which are declared inside a function or block (such as loops or conditionals) and are only accessible within that scope. By default local variables cannot initialize automatically, In case if you don't assign any value to that local variable, then it ... Read More
What is Pronic number? In mathematical terms, a Pronic number is a number that can be defined as the product of two consecutive integers. The Pronic number is in the form of n(n+1), where n is the integer. For example, the pronic numbers are 0, 2, 6, 12, 20, and so on. It is also known asa heteromecic number, oblong number, or rectangular number. Input & Output Scenarios Following are the scenarios that show the mathematical calculation for checking of the pronic number: Scenario 1 Suppose we have a number 12: Input: 12 Output: 4 x 3 = ... Read More
In mathematical terms, three points are said to be collinear if all three points lie on a straight line. If the points do not lie on the same straight line, then they are not considered collinear points. Those three points represent coordinates on a plane: (x1, y1), (x2, y2), and (x3, y3). They must lie on the same straight line to be considered collinear. Where, x1, y1, x2, y2, x3, y3 are the points on x and y axis and (x1, y1), (x2, y2), (x3, y3) are the coordinates.Determining Colinearity Mathematically, there are two ways to know whether the three points ... Read More
In Python, a class is a collection of objects. It is the blueprint from which objects are being created. It is a logical entity that contains some attributes and methods. Following is an example of a Python class - class Tutorialspoint: print("Welcome to Tutorialspoint.") obj1 = Tutorialspoint() When are Python classes Garbage collected? In Python, the objects are eligible for garbage collection when the reference count of the object is zero. Similarly, the classes are garbage collected when no instances of the class have been created and it is no ... Read More
A List in Python is a mutable sequence of elements separated by commas ", ". It is represented by square braces "[ ]".An empty list contains no elements, meaning its length is 0. It is indicated by the square braces with no elements in it.In this article, we will explore various methods to check whether a given list in Python is empty.Checking for an Empty List using Not Operator In Python, the not operator is one of the logical operators. If the given condition is True, it will return False and vice versa. This operator evaluates the empty list as False. The 'not' ... Read More
The garbage collector doesn't track (and collect) all the objects; it can only track objects that are unreachable (have a reference count of zero), and the objects that are involved in circular references. What is a garbage collector? The garbage collector is an automatic (implicit) process that handles memory allocation and deallocation, ensuring efficient use of memory. We can interact with the garbage collector in Python explicitly and modify its behavior, using the gc module; it is a built-in module in Python for garbage collection. By default, it is turned ON; you may turn it off if you are sure ... Read More
By using the dict() method in Python, we can create a dictionary with the list comprehension. Following is the syntax of dict() method- dict(**kwarg) Keyword arguments. We can pass one or more keyword arguments. If no keyword argument is passed, then the dict() method will create an empty dictionary object. The syntax for creating a dictionary with list comprehension: dict(list_comprehension) Creating Dictionary using List Comprehension Instead of sending a number of keywords here, we need to send a list of tuples with key-value pairs to the dict() method. Let’s take an example and create a dictionary using a ... Read More
Tuple is one of the data structures of the Python programming language. It is used to store multiple values separated by commas in an ordered manner. It is immutable in the sense that once the tuple is created cannot perform any operations like deleting, appending, etc. The elements in the tuple can be int, float, string, or binary data types, and it allows duplicates of the elements. It uses indexing for accessing the elements. It allows a single element to be in a tuple. There are different ways to create the empty tuple. Let’s see each way in detail. ... Read More