Flash cards
Review the key moves
1/4
Core idea
What is the main idea behind Go Float Data Types?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
1Quick choice
Which statement best captures the main point of this lesson?
2Order
Put the learning moves in the order that makes the concept easiest to apply.
The float64 Keyword
The float32 Keyword
Go Float Data Types
The float data types are used to store positive and negative numbers with a decimal point, like 35.3, -2.34, or 3597.34987.
The float data type has two keywords:
| Type | Size | Range |
|---|---|---|
| float32 | 32 bits | -3.4e+38 to 3.4e+38. |
| float64 | 64 bits | -1.7e+308 to +1.7e+308. |
Tip
The default type for float is float64 . If you do not specify a type, the type will be float64 .
The float32 Keyword
float32The float64 Keyword
The float64 data type can store a larger set of numbers than float32 .
float64Which Float Type to Use?
The type of float to choose, depends on the value the variable has to store.
Example
package main
import ("fmt")
func main() {
var x float32= 3.4e+39
fmt.Println(x)
}