The ( ) generalized by DIJKSTRA means writing a program using only the basic components shile removing the GOTO command which was the key agent in compilicating the logics of existing program in order to make corrections easily when necessary. The ( ) generally uses three logical structures and the first is sequential structure shich executes in sequence, second is selective which select one out of two and executes according to given conditions and the third is repeating structure which has schemed the simplification of program's processing procedure by executing the given block or repeatedly executing it.