What is the meaning of syntax if(a&&b) without any condition??????

Answer 1

This acts like a condition.
If atleast one of the two values is 0, only then the condition turns false.
For all values except 0's in a and b, the statements following it is executed

Answer 2

&& is AND operator. a&&b is true when a and b are true and is false otherwise. That means if a and b are true then executes the if block.

Answer 3

But what where is the condition to which these variables are getting compared.....?

Answer 4

a and b should contain value of boolean. Such as (x > y) or (x == 2) is accepted in the place of a and b.