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JShell is a command-line tool used to evaluate simple statements, expressions, classes, methods, variables, etc.. and prints the output immediately to the user.An array in Java is also an object. We need to declare an array and then created. In order to declare a variable that holds an array of integers, we can mention like int[] array. In an array, the index starts from 0 to (length of array - 1).In the below code snippet, we can use an index to find the specific element from the array. It will be done by using an indexing operator: []. The expression marks[0] maps ... Read More
Each primitive type in Java has a corresponding built-in wrapper class, and these wrapper classes are also immutable. Integer, Float, Double, Byte, and etc.. are some of the built-in wrapper classes. The main incentive of using such wrappers in our code is accessing type information about the corresponding primitive type, Auto-Boxing feature, where a primitive data is automatically promoted to an object reference type, and moving primitive type data around data structures.We can create an instance of Wrapper Classes by using a new operator, and also use the valueOf() method within types such as Integer to create a wrapper object. ... Read More
In this tutorial, we are going to learn how to calculate Wind Chill Index in Python. We have the formula to calculate the WCI and it's straightforward. We are going to use the following formula to calculate the WCI.Twc(WCI) = 13.12 + 0.6215Ta – 11.37v+0.16 + 0.3965Tav+0.16whereTwc = Wind Chill Index (Based on Celsius temperature scale)Ta = Air Temperature (in degree Celsius)v = Wind Speed (in miles per hour)We are going to use the math module function wherever we need them. Using the math module function decreases the execution time of a program.Follow the below steps to complete the program.Import the math moduleInitialize the ... Read More
In this tutorial, we are going to explore different methods to find whether a given number is valid or not. Let's start without further due.Method-1It's a general method to find prime numbers.If the number is less than or equal to one, return False.If the number is divisible by any number, then the function will return False.After the loop, return True.Example Live Demo# checking for prime def is_prime(n): if n
In this tutorial, we are going to write an anonymous function using lambda to rearrange positive and negative number in a list. We need the pick the negative numbers and then positive numbers from a list to create a new one.AlgorithmLet's see how to solve the problem step by step.1. Initialize a list with negative and positive numbers. 2. Write a lambda expression the takes a list as an argument. 2.1. Iterate over the list and get negative numbers 2.2. Same for positive numbers 2.3. Combine both using concatination operator. 3. Return the resultant list.Note - Use ... Read More
In this tutorial, we are going to learn about the logarithmic functions from math module. We have four variants of logarithmic functions. Pythons' provides all of them in the math module. Let's learn about them one by one.math.log(number, [Base])The math.log(number, [Base]) method is used to compute the logarithm of any Base. If we didn't specify any base value, then it will take e as default base.Note − You will get ValueError if you pass a negative number to the method.ExampleLet's see some examples. Live Demo# importing math module import math # logarithm with base 3 print(math.log(15, 7))OutputIf you run the above ... Read More
In this tutorial, we are going to learn how to use dictionary comprehensions in Python. If you are already familiar with list comprehension, then it won't take much time to learn dictionary comprehensions.We need the key: value pairs to create a dictionary. How to get these key-value pairs using dictionary comprehension? See the general statement of dictionary comprehension.{key: value for ___ in iterable}We need to fill in the above statement to complete a dictionary comprehension. There are many ways to fill it. Let's see some of the most common ways.Let's see how to generate numbers as keys and their squares ... Read More
In this tutorial, we are going to write a program that prints the name of the Python script file. We can find the script name using the sys module.The sys module will store all the command line arguments of python command in the sys.argv list. The first element in the list is the script name. We can extract it from that list. Python makes it easy.Let's see the steps involved in the program.Import the sys module.Now, print the first element of the sys.argv list.That's it. You got the script name.ExampleLet's see it practically. Live Demo# importing the sys module import sys ... Read More
In this tutorial, we are going to learn about the try and except of Python. Python has a concept called error and exception handling.The keywords try and except are used in the error and exception handling.Basically, we will find two types of errors in Python. They are −Syntax errors - Python gives these types of error when it doesn't understand a line of code in the program.Exception errors - Errors which are detected during the runtime of the program. Ex:- ZeroDivisionError, ValueError, etc.., We can't stop syntax errors. But, we can intimate if the program runs into an exception error ... Read More
List are the type of containers that stores data in sequential manner and allocate noncontiguous memory to the elements. In C++, lists are considered as doubly linked list where insertion and deletion of elements can be done from both the ends and therefore, it is also possible to traverse the list from both the end. For using singly linked list we use the forward list available in C++ STL.Advantage of using List over vector is thatList are faster in insertion and deletion of elements available in list container if the iterator is positioned to the correct element.Disadvantage of using List ... Read More