Select the missing expression in the code fragment below.The method should continue to prompt the user for a valid integer value until one is entered.The method returns the final value entered. 
Definitions:
Albert Einstein
A theoretical physicist renowned for developing the theory of relativity, one of the two pillars of modern physics, and making significant contributions to the field of quantum mechanics.
Gandhi
A preeminent leader of the Indian independence movement in British-ruled India, known for his philosophy of nonviolent resistance.
Flesh And Blood
A phrase used to emphasize that someone is a living human being with emotions and vulnerabilities, often used in a familial context.
Servant Leader
A leadership philosophy in which the main goal of the leader is to serve others, prioritizing the well-being of their team members and organization.
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