Meaning of the variable 'verb'

[TXTsky]

Hi,
When I was reading your code, I saw a variable verb. I'm sorry I didn't understand the function of the variable. Could you please tell me the details of the variable?
For example, in example/amg.c
pars.verb = 3;

Thanks!

[Hui Liu]

verb controls how much information will be output during assembling and solution. Higher value means more output. 0 or negative means no output...

[TXTsky]

Thanks!