JavaScript Check if String Contains at Least One Number

Inside this article we will see the concept i.e JavaScript check if String contains at least one Number. Article contains the classified information about checking at least a digit inside string by using javascript regular expressions and/or methods. Tutorial is super easy to understand and implement it in your code as well.

If you are looking for a solution to check a digit inside a string in javascript using regular expression then this article will help you a lot for this.

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Let’s get started.

Example #1 – Check a Digit in a String Using [0-9]

Here,

We will use javascript regular expression [0-9] a pattern to check a digit exists or not inside a string.

//...

<script>

var str1 = 'Welcome 123 to Online Web Tutor';
var str2 = 'Sanjay Kumar';

function containsNumber(str) {
    return /[0-9]/.test(str);
}

console.log(containsNumber(str1)); // true
console.log(containsNumber(str2)); // false
  
</script>

//...

//...

​

<script>

​

var str1 = 'Welcome 123 to Online Web Tutor';

var str2 = 'Sanjay Kumar';

​

function containsNumber(str) {

    return /[0-9]/.test(str);

}

​

console.log(containsNumber(str1)); // true

console.log(containsNumber(str2)); // false

</script>

​

//...

​

Executing inside browser console window

Example #2 – Check a Digit in a String Using \d

Here,

We will use javascript regular expression \d a pattern to check a digit exists or not inside a string.

//...

<script>

var str1 = 'Welcome 123 to Online Web Tutor';
var str2 = 'Sanjay Kumar';

function containsNumber(str) {
    return /\d/.test(str);
}

console.log(containsNumber(str1)); // true
console.log(containsNumber(str2)); // false
  
</script>

//...

//...

​

<script>

​

var str1 = 'Welcome 123 to Online Web Tutor';

var str2 = 'Sanjay Kumar';

​

function containsNumber(str) {

    return /\d/.test(str);

}

​

console.log(containsNumber(str1)); // true

console.log(containsNumber(str2)); // false

</script>

​

//...

​

Executing inside browser console window

We hope this article helped you to learn JavaScript Check if String Contains at Least One Number in a very detailed way.

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