IF() have only variable???

Question

In c++ when if() statement with variable only (without any comparison to anything else) is implemented what does that check for

eg:

if(a)
cout<<"LIKE IT";

now What is the condition on which if statement will run...

Answer 1

the statement in brackets must return true or false (boolean)(true = execute, false = don't) that's why we put conditions there ((1 + 1 == 2) == true)
if "a" is true or different than 0
it'll execute else it won't...

Answer 2

I think so...

Answer 3

good question

0 is equal to false
1 is equal to true

Answer 4

in some languages everything higher than 0 is true

Answer 5

it works for negative values too (-4,-1....)
means it returns false for 0 only...???
m i right???