Using match() method on string with regex Using startsWith() method In this post, we will see how to check whether the first character in a string is a space or not using Javascript. To check if a string starts with a space or not we can use: ...
// program to check if the number is even or odd// take input from the userconstnumber = prompt("Enter a number: ");//check if the number is evenif(number %2==0) {console.log("The number is even."); }// if the number is oddelse{console.log("The number is odd."); } Ru...
If the cleaned string and its reversed form are equal, the input string is a palindrome, and the function returns true. Otherwise, it returns false. In the "main()" function, two sample strings (str1 and str2) are defined. The "isPalindrome()" function is called for each string, and...
How do you check if one string contains a substring in JavaScript?Craig Buckler
JavaScript Code:// Function to check if a given string is a palindrome using recursion function isPalindrome(str) { // Base case: if the string has 0 or 1 characters, it's a palindrome if (str.length <= 1) { return true; } // Check if the first and last characters are equal if...
check if a string contains substring in Javascript 6.Javascript String Contains Case-insensitive check To check for case-insensitive Javascript string contains, use the below methods. The simplest way is to convert the entire string to either to lowercase or uppercase and use the javascript...
In JavaScript, undefined is the default value for variables that have been declared but not initialized. On the other hand, null is an intentional assignment that explicitly indicates the absence of a value. Methods to Check if a Variable is Undefined Using typeof Operator Using Strict Equality...
if(number>0){// Positive}else{// Negative} versus if(Math.sign(number)>0){// Positive}else{// Negative} Indeed, if you're just checking the boolean status, then I'd just use the comparative operator instead of usingMath.sign. But whereMath.signshines is it returns a number value. ...
Before we wrap up, let’s put your knowledge of JavaScript Program to Check Armstrong Number to the test! Can you solve the following challenge? Challenge: Write a function to check if a number is an Armstrong number. An Armstrong number of three digits is an integer such that the sum ...
Vue Js Check if a Variable is an Array: In Vue.js, you can use the Array.isArray() method to check if a variable is an array or not. This method takes one parameter, which is the variable you want to check, and returns a boolean value. If the variabl