The syntax of if-else allows us to have only a single statement in the then-branch (or the else-branch). If we want to execute more than one statement in the then-branch (or the else-branch), we have to use a block construct. A block of statements groups several statements in a single composite statement.
Syntax:
{
statement
...
statement}
Semantics:
The statements in the block are executed in sequence. The variables declared inside the block are not visible outside the block itself.
Example:
int a, b, bigger; ... if (a > b) { bigger = a; System.out.println("smaller = " + b); }