Simple calculator

Write a function @calculator(a, b, operator)@ to compute simple arithmetic expressions. The function receives as arguments two numbers $a$ and $b$ and a character @operator@ that is always either ’+’, ’-’ or ’*’. The function has to return either the addition $a + b$ , substraction $a - b$ or the multiplication $a*b$ depending on the actual value of @operator@.

Sample session

Problem information

Author: ProAl

Generation: 2026-01-25T17:38:17.222Z