12. Integers

Using Natural Numbers

Integer Types

  • Integers are used to store natural numbers are 1,2,3.

  • Go has 8 types on integers

  • int8, int16, int32, and int64, and corresponding unsigned versions uint8, uint16, uint32, and uint64.

  • unsigned integers can store positive numbers only.

  • 8,16,32 and 64 represents how many bits are used to store value.

Declaring Integers

Integers are declared using one of the 3 ways:

var j int32 = 20
var i int = 10
var i = 10
i := 10
var k int

If we are not specifying type like in 2nd and 3rd declaration, it will default to int

Zero value for integer is 0

Always use short declaration way when assigning initial value. If you wish to initialize a variable to its zero value, use var declaration.

Using Test Driven Development for integers

Learn how to do test driven development when using integers from Chris

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