Which mathematical constant is defined as the limit of (1+1/n)^n as n approaches infinity?

Euler's number

Which musical contains songs by ABBA and was adapted into a 2008 film starring Meryl Streep? Who is known as the main protagonist from the 'Half-Life' series? Who famously sang the 1978 disco hit "I Will Survive"? Who originally portrays Howard Stark in the MCU films? Who was the first person to reach the South Pole?