Go Functions

External

• https://go.dev/ref/spec#Function_types

Internal

• Go Language

Overview

A function is a block of instructions, grouped together, and that optimally have a name.

Go functions allow variables to be declared, inside the function, with the short variable declaration.

main()

All programs in Go must have a main() function.

Pass by Value vs. Pass by Reference vs. Pass by Pointer

Arrays are passed by value.

Built-in Functions

Built-in functions are available by default, without importing any package. Their names are predeclared function identifiers. They give access to Go's internal data structures. Their semantics depends on the arguments.

append()	cap()	close()	complex()	copy()
delete()	imag()	len()	make()	new()
panic()	print()	println()	real()	recover()

Length and Capacity

https://golang.org/ref/spec#Length_and_capacity

len()

len() returns string length, array length, slice length and map size.

cap()

cap() returns slice capacity.

Complex Number Manipulation

complex()

real()

imag()

TO DO: Continue to Distribute These Built-in Functions

close()

Allocation: new()

Making slices, maps and channels: make()

Appending to and copying slices: append(), copy()

Deletion of map elements delete()

Handling panics panic(), recover()

DEPLETE THIS

Built-in functions for type conversions.

deplete this Go Concepts - Functions