Types in Depth

Types in Depth

In this lesson — part of Data Deep Dive — you'll learn types in depth in Go and why it matters in real work.

Why it matters

Types tell you what operations make sense and catch whole classes of bugs early.

Key ideas

• Common types: text, numbers, booleans
• Type conversion and coercion
• When to be explicit about types
• Type errors and how to read them

In practice

Here's how it looks in idiomatic Go:

package main

import "fmt"

func main() {
	var count int = 42
	var price float64 = float64(count) * 1.5 // explicit conversion required
	ok := true
	fmt.Printf("%d %.1f %t\n", count, price, ok)
}

Go note: Go has no implicit numeric conversions—you must convert explicitly with T(x), even between int and float64.

Try it yourself

Exercise: In Go, convert a number to text and back, and print both.

Recap

You now understand types in depth and can apply it in Go. Mark this lesson complete and continue to the next one.