They asked me to write a small program logic where, given an HTML form that takes a contact number and a country code (IN or USA), I had to validate that the contact number:
• Is exactly 10 digits long
• Contains only numbers
• Then append the country code prefix: +91 for India or +1 for USA

This tested basic string handling and logic-building skills.

Question

They asked me to write a small program logic where, given an HTML form that takes a contact number and a country code (IN or USA), I had to validate that the contact number:
	•	Is exactly 10 digits long
	•	Contains only numbers
	•	Then append the country code prefix: +91 for India or +1 for USA

This tested basic string handling and logic-building skills.

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