System recursion When a function calls itself is known as recursion. Redundant Duplication of data Routines routines are otherwise called as functions or methods. In Python it is also called as definition Schema Structure or model Scope Visibility of variables, parameters and functions in one part of a program to another part of the same program. Script A Python program stored in a file.
Script Mode A way of using the Python interpreter by typing command and expressions at the prompt. Select ( σ ) The SELECT operation is used for selecting a subset of the tuples according to a given selection condition Selectors Functions that retrieve information from the data type. Sequential One after another Set difference(-) (-) symbol denotes it. The result of A-B is a relation which includes all tuples that are in A but not in B.
skipinitialspace=true When true, whitespace immediately following the delimeter is ignored. The default is false slicing cut Stack A stack (sometimes called a “push-down stack”) is an ordered collection of items where the addition of new items and the removal of existing items always takes place at the same end. This end is commonly referred to as the “top.” The end opposite the top is known as the “base.This ordering principle is sometimes called LIFO, last- in first-out. stride a long step string sequence of letters, numbers or symbols subscript an index number 12th Std - CS EM Glossary - - Syntax The structure of a program Syntax Error An error in a program that makes it impossible to parse.
Token One of the basic elements of the syntactic structure of a program. Tuple It is a sequence of immutable(not changeable) objects. Tuples are sequences, just like lists.Tuples are defined by having values between parentheses ( ). Union operation(U) Union is symbolized by symbol.
It includes all tuples that are in tables A or in B. variable Memory box to store values writer ow() Method to write a single row of data in a file writer ows() Method to write multiple rows of data in a file