JavaScript: Check whether a given value is US zip code or not

JavaScript validation with regular expression: Exercise-12 with Solution

Write a JavaScript function to check whether a given value is a US zip code or not.

Sample Solution:

JavaScript Code:

function is_usZipCode(str)
{
 regexp = /^[0-9]{5}(?:-[0-9]{4})?$/;
  
        if (regexp.test(str))
          {
            return true;
          }
        else
          {
            return false;
          }
}

console.log(is_usZipCode("03201-2150"));

console.log(is_usZipCode("7892"));

Output:

true
false

Flowchart:

Live Demo:

See the Pen javascript-regexp-exercise-12 by w3resource (@w3resource) on CodePen.

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