Convert a list to valid restrictions with the Wolfram Language?

Questions
1

I got a list like this

list={cond1,cond2,...}

, and I want to convert it to

cond1&&cond2&&...

How can I do that?
I tried using

Do[
  constrains = And[list[[i]]]
  , {i, Length[list]}
  ];

But it doesn’t work, it’s constantly evaluating the And[ ].

2

It’s the command Apply, with its shortcut @@:

And@@{cond1,cond2,...}

Structurally, Apply[f,g[x1,x2,...]] removes g and replaces it with f. In our case, List[cond1, cond2, ...] becomes And[cond1, cond2, ...].