What is the difference between a function and a task? in verilog

1. behavior –

Function : function call happens in real time OR no simulation delay can be inserted during the function call

Task : Tasks can be inserted with a delay

1. No of outputs :

Function : A function can have at least one input arg to be passed, and also it can have only one output to drive

Task : Task can have any no of inputs and outputs.

1. Nesting :

Function : A function can call a function inside it but not a task

Task : Task can call either a function or a task inside it.

1. Synthesis :

Function : A function can be synthesized

Task : Tasks are not synthesizable

1. Limitations :

Function : A function does not allow any delay, timing, event inside it

Task : Tasks can have delays, events inside it

1. Usage :

Function : A can be used for RTL as well as behavioral coding ( mostly for combinational logic)

Task : Tasks can be used for behavioral modeling only.