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We will learn how to swap two variables in one line. Let’s say the following is our input − a = 10 b = 5 The following is our output after swap − a = 5 b = 10 Swap two variables in one line using comma operator Using the comma operator, you can create multiple variables in a single line. The same concept is considered here and the variable values are swapped − Example a = 5; b = 10; print("Variable1 = ", a); print("Variable2 = ", b); # Swap two variables in one line ... Read More
JavaScript is an untyped language because in JavaScript the variables can hold any data type meaning that JavaScript does not have a type declaration and when the variable is created we do not need to specify any data type unlike other programming languages like Java, C#, C++, etc. which needs int, char, float, etc. to create a variable. In JavaScript we use var, let, and const to create a variable. One of the best parts of untyped language is it gives the flexibility to reassign any type of value to a variable, it doesn't matter whether the initialized value was ... Read More
To check if a string is a valid keyword, import the keyword module and use the iskeyword() method. With that, you can directly display all the keywords at once and verify. Let’s say the following is our input − else The following is the output. The “else” is a keyword in Python − Keyword Check if a string is a valid keyword in Python Example import keyword # Create a List myList = ["for", "amit", "val", "while"] # Display the List print("List = ", myList) keyword_list = [] non_keyword_list = [] # Looping and ... Read More
We will display duplicates from a list of integers in this article. The list is can be written as a list of comma-separated values (items) between square brackets. Important thing about a list is that the items in a list need not be of the same type Let’s say we have the following input list − [5, 10, 15, 10, 20, 25, 30, 20, 40] The output display duplicate elements − [10, 20] Print duplicates from a list of integers using for loop We will display the duplicates of a list of integer using a for loop. We ... Read More
Keywords in Python are reserved words. You cannot use them as variable name, function name, class name, etc. Following are the Keywords in Python − Keywords in Python FALSE await else import pass None break except in raise TRUE class finally is return and continue for lambda try as def from nonlocal while assert del global not with async ... Read More
The Calendar module in Python is used to display calendars and provides useful Built-in functions for displaying week, week day, month, month of the year, and other operations. By default, these calendars have Monday as the first day of the week, and Sunday as the last. Display the Calendar of an Year To display the calendar of an year, use the calendar() method and set year as the parameter − Example import calendar # Set the year year = 2022 # Display the calendar print(calendar.calendar(year)) Output ... Read More
To quickly convert Decimal to other based, we will be using the Built-in functions in Python − Decimal to Binary − bin() Decimal to Octal − oct() Decimal to Hexadecimal − hex() Decimal number system has base 10 as it uses 10 digits from 0 to 9. In decimal number system, the successive positions to the left of the decimal point represent units, tens, hundreds, thousands, and so on. Binary uses two digits, 0 and 1. Also called as base 2 number system Each position in a binary number represents a 0 power of the base (2). Last ... Read More
CDATA, the short form of Character Data is a block of code that has been written to prevent parsing by the parser. Sometimes our data includes predefined characters like “ Syntax str.replace("regex", "") Here str is the string from which you want to remove the CDATA, regex is the regular expression to find the block data. Example In the below program example, we remove the CDATA blocks and tags inside a script element using the String replace() method. We pass the regex defined above as an argument to the replace() method and the second argument is an empty string. ... Read More
We can easily perform matrix manipulation in Python using the Numpy library. NumPy is a Python package. It stands for 'Numerical Python'. It is a library consisting of multidimensional array objects and a collection of routines for processing of array. Using NumPy, mathematical and logical operations on arrays can be performed. Install and Import Numpy To install Numpy, use pip − pip install numpy Import Numpy − import numpy Add, Subtract, Divide and Multiply matrices We will use the following Numpy methods for matrix manipulations − numpy.add() − Add two matrices numpy.subtract() − Subtract two matrices numpy.divide() ... Read More
In this article, we will see how to convert Binary to Decimal and Decimal to Binary. Binary is the simplest kind of number system that uses only two digits of 0 and 1 (i.e. value of base 2). Since digital electronics have only these two states (either 0 or 1), so binary number is most preferred in modern computer engineer, networking and communication specialists, and other professionals. Decimal number system has base 10 as it uses 10 digits from 0 to 9. In decimal number system, the successive positions to the left of the decimal point represent units, tens, hundreds, ... Read More