Answers for "check if a variable is a number"

-2

javascript check if number

// The first 2 Variations return a Boolean
// They just work the opposite way around

// IsInteger
if (Number.isInteger(val)) {
	// It is indeed a number
}

// isNaN (is not a number)
if (isNaN(val)) {
	// It is not a number
}

// Another option is typeof which return a string
if (typeof(val) === 'number') {
	// Guess what, it's a bloody number!
}
Posted by: Guest on March-15-2020
5

check if input is a number javascript

// Another option is typeof which return a string
if (typeof(val) === 'number') {
	// Guess what, it's a bloody number!
}
Posted by: Guest on June-27-2020
4

javascript check if variable is number

function isNumber(n) {
  return !isNaN(parseFloat(n)) && !isNaN(n - 0);
}
Posted by: Guest on May-22-2020
0

check if value is number

if(isNaN(num1))
OR:
if(typeof num1 == 'number'){
    document.write(num1 + " is a number <br/>");
 }else{
    document.write(num1 + " is not a number <br/>");
 }
Posted by: Guest on September-12-2021

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