Write a JavaScript program to check if a given number is even or not. Checks whether a number is odd or even using the modulo (%) operator. Returns true if the number is even, false if the number is odd. Sample Solution: JavaScript Code: // Define a function 'isEven' that checks if...
Enter a number: 5 The number is odd. Also Read: Javascript Program to Check if a number is Positive, Negative, or Zero JavaScript Program to Check if a Number is Float or IntegerBefore we wrap up, let’s put your knowledge of Javascript Program to Check if a Number is Odd or Even...
Write a JavaScript program to check whether a number is even or not. Visual Presentation: Sample Solution: Using recursion: JavaScript Code: // Recursive JavaScript function to check if a number is even.functionis_even_recursion(number){// If the number is negative, convert it to its absolute...
下面是一个完整的示例,展示了如何使用JavaScript来检查一个日期是否符合yyyy/mm/dd格式: AI检测代码解析 functioncheckDateFormat(dateString){constregex=/^\d{4}\/\d{2}\/\d{2}$/;returnregex.test(dateString);}functionvalidateDate(dateString){if(checkDateFormat(dateString)){console.log('日期格式正确!'...
Use the less than or equals to `<=` operator to check if a number is not greater than zero in JavaScript.
Use parseFloat() to try to convert n to a number. Use !Number.isNaN() to check if num is a number.
Before we wrap up, let’s put your knowledge of JavaScript Program to Check Prime Number to the test! Can you solve the following challenge? Challenge: Write a function to check if a number is prime or not. A number is prime if it has only two distinct divisors: 1 and itself. ...
Since we want to check if a variable is a number, we will use the not operator, !, in our checks. Now let's check if the not operator and Number.isNaN() function can filter only numbers: > !Number.isNaN(intVar); true > !Number.isNaN(floatVar); true > !Number.isNaN(stringVar...
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 using Math.sign. But where Math.sign shines is it returns a number value. This means you can do ...
If the variable is a Boolean value, typeof will return the string 'boolean'. Copy vara =Boolean(true);varb = false;//www.java2s.comvarc ="";vard = newDate();if(typeofa ==='boolean') { console.log("a is a Boolean"); } else { console.log("a is not a Boolean"); }if(...