if (boolean-expression) statement1 else statement2
class IfElse1 { public static void main (String[] args) { int i = 10; if ( i==1 ) System.out.println( "i == 1" ); else if ( i==2 ) System.out.println( "i == 2" ); else if ( i==3 ) System.out.println( "i == 3" ); else System.out.println( "don't know what 'i' is" ); } }