Tag: Number
Check if a Number is NaN in Javascript
While working in javascript, we get a requirement to determine if a value is NaN in javascript. This article demonstrates easy ways to find out if a particular variable is NaN.NaN in javascript is a global property with the value representing Not-a-Number. 1. Check if a Value is NaN using isNaN() method The method isNaN(_value) …
Check If String starts with a Number in Python
This article will discuss different ways to check if a string starts with a number in Python. Table of Contents Check if a String starts with a Number using isdigit() Check if a String starts with a Number using Regex Check if a String starts with a Number using isdigit() In Python, the string class …
JavaScript: Check if String Starts with Number
A general requirement many people encounter while working with javascript strings is to check if the first letter of the string is a number. This article demonstrates easy ways to check if the string starts with a digit using different methods and illustration examples. Table of Contents: Check if String Starts with Number using RegExp …
Check if a string contains a number in Python
In this article, we will discuss different ways to check if a string contains a number or not in Python. Table of Contents Check if a string contains a number using any() and List Comprehension Check if a string contains a number using Regex Check if a string contains a number using any() & map() …
Get number of elements in a list in Python
In this article, we will discuss different ways to get the number of elements in a list or a list of lists or a nested list in Python. Table Of Contents Get number of elements in a simple list Get number of elements in a list of lists Get number of elements in a nested …
Format a floating number to fixed width in Python
In this Python tutorial, we will learn how to format a floating number to a fixed width. Table Of Contents Format a floating number to fixed width using % operator Format a floating number to fixed width using round() Format a floating number to fixed width using format() Summary Format a floating number to fixed …
Check if a number exists in a list in Python
In this article, we will discuss different ways to check if a list contains a given number or not. Table Of Contents Method 1: Using in operator Method 2: Using any() function Method 3: Using filter() function Method 4: Using list.count() function Summary Method 1: Using in operator We can directly use the in operator …
Check if a string is a number in C++
In this article, we will discuss different ways to check if a string is a number or not in C++. Basically, we will confirm that string contains only digits. Table Of Contents Problem description Method 1: Using Loop Method 2: Using STL Algorithm std::find_if() Method 3: Using STL Algorithm std::all_of() Method 4: Using strtol() function …
Convert a number to a list of integers in Python
This tutorial will discuss about unique ways to convert a number to a list of integers in Python. Table Of Contents Method 1: Using List Comprehension Method 2: Using map() method Method 3: Using enumerate() method Method 4: Using for-loop Summary Method 1: Using List Comprehension Convert the given number to string using str() method. …
Pandas – Select Rows by Index position or Number
This tutorial will discuss about different ways to select DataFrame rows by index position or index number in Pandas. Table Of Contents Preparing DatSet Select a Row by index Position in Pandas DataFrame Select Multiple Rows by index numbers in Pandas DataFrame Select multiple rows by index range in Pandas DataFrame Summary Preparing DataSet Let’s …