---
title: "Session 1 — Arithmetic operations"
subtitle: "QSS 1.3.1 | Probability and Statistics (MIR)"
author: "Prof. Dae-Jin Lee (daelee@faculty.ie.edu)"
date: "Fall 2026"
output:
  html_document:
    toc: true
    toc_float: true
    theme: flatly
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE, message = FALSE, warning = FALSE)
```

R as a calculator (from `vignette("intro", package = "qss")`).

```{r}
5 + 3
5 - 3
5 / 3
5^3
5 * (10 - 3)
sqrt(4)
```

**Interpret:** Check that each output matches what you expect before moving on.