Python · Theory

eval()

Theory

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eval() is built into Python. You do not import it. Freshers only need one honest call and the printed result — not a long definition.

eval() — output — 5. eval runs a string as code — don’t use on user input.

Wrong type often raises TypeError. Empty values matter for bool/all/any. Don’t mix eval up with a similar name (sorted vs sort, int vs float).

Exam tip

Call eval() once and say what prints.

# eval()
print(eval("2 + 3"))

eval() — output: 5. eval runs a string as code — don’t use on user input.