In the Wolfram System's standard notebook interface, you are directly giving input and getting output every time you press . Although much more rarely needed than in more primitive languages, the Wolfram Language also allows you to get input and generate output as side effects in a computation.

Print — print any expression, including graphics, as output

PrintTemporary — print temporarily, cleaning up when a computation is complete

Echo — print and return any expression

EchoEvaluation — print expressions and the results of evaluating them

Formatted Output »

"string" (String)  ▪  Row  ▪  Column  ▪  ...

Input, InputString — put up a dialog to request input of an expression or string

Pause  ▪  Beep  ▪  EmitSound

File Operations »

Import, Export — import and export in hundreds of formats

OpenWrite  ▪  OpenRead  ▪  Write  ▪  Read  ▪  ReadList  ▪  ...