Beginner Projects

Build these with nothing but what Level 1 covered — fmt, bufio, strconv, slices, maps, functions, and structs.

1. Command-Line Calculator

Read two numbers and an operator (+ - * /) with a bufio.Scanner, convert them with strconv.ParseFloat, and print the result. Return an error from your calculate function for division by zero or an unknown operator, and print a friendly message instead of crashing.

2. Number Guessing Game

Pick a random number with rand.IntN(100) + 1 (from math/rand/v2), then loop, reading guesses and printing "Too high" / "Too low" until the player guesses correctly. Count and print the number of attempts.

3. Word Frequency Counter

Read a line of text, split it with strings.Fields, lower-case each word, and count occurrences in a map[string]int. Print each word with its count — then sort the words alphabetically first, so the output order is stable.

4. Console To-Do List

Keep tasks in a []Task slice, where Task is a struct with a Title and a Done flag. Loop, presenting a menu (add / list / done / quit) handled with a switch.

5. Grade Book

Store student names and scores in a map[string][]int. Write functions that compute each student's average and the class's highest average, and print a formatted report with fmt.Printf (%-10s %6.1f).