Recap - Simple Calculator

Part of the Fundamentals section of Coddy's R journey — lesson 24 of 78.

Challenge

Easy

Build a simple calculator that performs different arithmetic operations based on the operator provided.

You are provided with the following variables:

a <- 20
b <- 4
operator <- "*"

Write a series of if-else statements that check the value of operator and perform the corresponding calculation:

If operator is "+", print the result of a + b
If operator is "-", print the result of a - b
If operator is "*", print the result of a * b
If operator is "/", print the result of a / b
If operator is anything else, print "Invalid operator"

Use the print() function for your output.

Try it yourself

# Variables are already defined
a <- 20
b <- 4
operator <- "*"

# TODO: Write your code below
# Use if-else statements to check the operator and perform the calculation
# Remember to use print() for your output

All lessons in Fundamentals

1Introduction to R

What is R?Hello World Comments in R

4Operators Part 2

Logical Operators (AND, OR)Logical Operators Part 2 (NOT)Recap - Simple Logic Vectorized Logic Part 1 Vectorized Logic Part 2

7Bill Split Calculator

Welcome Message Getting User Input

Calculating The Tip And Total

Splitting The Bill

Formatted Output (sprintf)

10FizzBuzz with a Twist

Game Overview The FizzBuzz Function

Looping Through Numbers

Adding The Twist

13Vectors Advanced

Vector Slicing and Indexing Logical Indexing Vector Arithmetic & Recycling The %in% Operator