Astructure can execute a set of statements only under certain circumstances.

Decision structure. This can test conditions and then depending on the result of the test. Different operations can be done. This is usually done by the use of 'if' and 'the'. Use and 'if' ..'then' structure to do one statement in condition. Conditions is usually a comparison, this can also be expressed in numerical value. Sometimes this is called as the visual basic.

The answers no