会在if语句中执行所有条件吗？

Question

Example:

if function1(input) && function2(input) {}

In this case would function2(input) be executed if function1(input) returns false?

Answer 1

What you are asking about is called Short Circuiting, and yes, Go does it.

In the language spec, it says that

Logical operators apply to boolean values and yield a result of the same type as the operands. The right operand is evaluated conditionally.

This means that, in your case, if function1 returned false, function2 would not be called.

See an example for && here and for || here.