Having integrity is a difficult term to define let alone live, but once you experience it, you’ll know. Someone either has it or not. Most will associate those having integrity with having a strong steady moral compass, complying to disciplined consistent principles.
An individual who lives a life of honesty with themselves, and with every person they associate with.
Integrity is a psychological process, which matches ones outer persona with their inner beliefs, combining to create a wholesome consistent unified individual. What this results in is fitting into society.