JavaScript: Check whether a given value is Canada Post Code or not

JavaScript validation with regular expression: Exercise-14 with Solution

Validate Canada Post Code

Write a JavaScript function to check whether a given value is a Canada Post Code or not.

Sample Solution:

JavaScript Code:

function is_caPostalCode(str)
{
 regexp = /^(?!.*[DFIOQU])[A-VXY][0-9][A-Z]\s?[0-9][A-Z][0-9]$/;
  
        if (regexp.test(str))
          {
            return true;
          }
        else
          {
            return false;
          }
}

console.log(is_caPostalCode("K8V3Y1"));

console.log(is_caPostalCode("K8V 3Y1"));

console.log(is_caPostalCode("Z4V4X1"));

Output:

true
true
false

Flowchart:

Live Demo:

See the Pen javascript-regexp-exercise-14 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that validates a Canadian postal code using a regular expression that accounts for alternating letters and numbers.
• Write a JavaScript function that formats the input postal code to uppercase before validation.
• Write a JavaScript function that strips out any extra spaces and checks the postal code against the official Canadian format.
• Write a JavaScript function that tests various Canadian postal codes and returns a boolean indicating validity.

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