Go TutorialLesson 6Free preview

Go Variables

This lesson is part of Go · All levels

Summary

This lesson teaches declaration of variables in Go using the keyword var, short declaration:=, as well as how to define type explicitly or through type inference. The unvalued variable is filled with zero values according to the data type. Variables can be declared one by one or at a time in a single block.

Key points

The formal declaration uses var, while the short declaration uses:= within the function
Go fill the empty variable with zero value: 0 for numbers, "" for strings, false for bool
Type inference makes Go guess the type of value given
Declared but unused variables will cause compile error

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