CODEWITHSUNDEEP
javascriptc#regexvalidation
ARUNRAJ
ARUNRAJ

Reputation: 489

Need a regex for checking "2 alphabets and 4 numeric" only in a string

I need your help to write a regex for validating a string that should follow below rule.

"2 Alphabet and 4 Numeric. And it can be a mixed string"

Eg: 11a1a1 or 1a11a1..etc

Thanks for your help.

Upvotes: 1

Views: 72

Answers (1)

wp78de
wp78de

Reputation: 18950

Try it like this:

^(?=.*\d.*?\d.*?\d.*?\d)(?=.*[a-zA-Z].*?[a-zA-Z]).+$

Since the question does not specify how long such a string could be, any length is accepted as long as the basic rule is fulfilled.

Demo

const regex = /^(?=.*\d.*?\d.*?\d.*?\d)(?=.*[a-zA-Z].*?[a-zA-Z]).+$/gm;
const str = `aa1111
b1b111
1111aa
11a1a1
1a11a1

aaaa11
bbb111
b1b1b1
b11b1b`;
let m;

while ((m = regex.exec(str)) !== null) {
    // This is necessary to avoid infinite loops with zero-width matches
    if (m.index === regex.lastIndex) {
        regex.lastIndex++;
    }
    
    // The result can be accessed through the `m`-variable.
    m.forEach((match) => {
        console.log(`Found match: ${match}`);
    });
}

Upvotes: 1

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