FLOWCHARTS
The flowchart is a diagrammatic representation of an algorithm. In other words, it is a visual picture which gives the steps of an algorithm and also the flow of control between the various steps. Flowcharts are used to describe the logic of a program.
Flowcharting symbols
Below are the symbols used to represent different programming operations?
Terminal symbol
this is an oval shaped picture used to signify the two ends of a program, that is ,where the program starts and where it stops

Input/output Symbol
The parallelogram is used to represent input and/or output operations

                                                                              
Process Symbol
The rectangle represents operations or processes such as calculations which definitely cause a change in values of variables.
 

                                                                              

Decision Symbol
The diamond or rhombus shaped picture represents a decision and is the key operation feature of the selection and looping structures.




 Connector Symbol
 This is basically used to indicate a connection to or from another part of the chart forced by limited space and can be used for entry and exit points within a flowchart.