In a flowchart, typically there will be a condition tested, with the answer "yes" or "no", and the flow corresponding to these two answers is indicated. that's the same thing as an if/else.
Well, the ideas are about right, but there are certain stylistic conventions of the way lines should be placed, which seem rather haphazard in that example.
Flowcharts are there for decision making. Yes you can represent an (If/else) statements from (Yes/no) from decision blocks which represented by diamond shapes. One side of the diamond should connect to the argument Yes, while the other is no same in the question should be inside the diamond shape (decision block) --<>-- then connected nodes will carry out if yes and else. Better have a look at these http://creately.com/diagram-type/objects/flowcharts