Why islamabad not an over populated city?

Islamabad is not considered an overpopulated city primarily due to its planned urban development and extensive green spaces, which limit high-density housing. The city was designed in the 1960s to accommodate a specific population size, resulting in a balanced infrastructure and a lower population density compared to other major cities in Pakistan. Additionally, its status as the capital attracts certain Demographics, but strict zoning regulations and governmental policies help maintain its manageable population level.