Make_a_function_that_does_arithmetic.md

CodeWars Python Solutions

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Make a function that does arithmetic!

Given two numbers and an arithmetic operator (the name of it, as a string), return the result of the two numbers having that operator used on them.

a and b will both be positive integers, and a will always be the first number in the operation, and b always the second.

The four operators are "add", "subtract", "divide", "multiply".

Try to do it without using if statements!

A few examples:

arithmetic(5, 2, "add")      => returns 7
arithmetic(5, 2, "subtract") => returns 3
arithmetic(5, 2, "multiply") => returns 10
arithmetic(5, 2, "divide")   => returns 2.5

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Given Code

def arithmetic(a, b, operator):
    # your code here

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Solution

def arithmetic(a, b, operator):
    ops = {"add": a+b, "subtract": a-b, "multiply":a*b, "divide":a/b}
    return ops[operator]

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