Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I know I can input
...to get $\phi$ in the Mathematica front end, but is there a way to get $\varphi$?
will give you φ, or Esc j Esc
use ESC j ESC to get curly PHI
It is in Palettes->Basic typesetting-> special characters