How deeply does Go in Action, Second Edition cover int64?

Explains range-oriented selection and conversion trade-offs, but does not develop int64’s internal representation.

Int64

As explained in Go in Action, Second Edition

int64 is Go's signed integer type that represents values using exactly 64 bits.

int64 is Go’s signed integer type with exactly 64 bits. It is the largest native integer type and suits values requiring the greatest range, including timestamps, file offsets, and size limits. section 3.1.1

Choose int64 when its range or API compatibility justifies it:

Use it for values passed frequently to functions that accept int64. section 3.1.1
Prefer int for general-purpose integers unless the domain requires int64; convert from int when needed. section 3.1.1
Avoid choosing smaller integer types merely to save memory; benchmark and profile before treating representation size as a performance problem. section 3.1.1

How Go in Action, Second Edition covers it

liveBook manning.com

Read Go in Action, Second Edition on liveBook Get the book at manning.com

Related concepts

integerkind of · An integer is a whole-number value with no fractional part, including negative numbers, zero, and positive numbers.
8-bit signed integercontrasts with · An 8-bit signed integer is a fixed-width integer type representing whole-number values from −128 through 127.
astypeproduced by · astype is a pandas or NumPy method that returns values converted to a specified data type.
float64produced by · Float64 is a 64-bit floating-point numeric type, commonly represented using the IEEE 754 binary64 format.

This explainer was generated by Manning's knowledge graph from the text of Go in Action, Second Edition. The section links point to the parts of the book it draws on.