PDA Glossary
Glossary
Glossary
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Flashcards
A function or method argument that is not required.
A statement that calls a method.
A variable used to count something, usually initialized to zero and then incremented.
A pattern of traversal that stops when it finds what it is looking for.
To iterate through the items in a sequence, performing a similar operation on each.
The property of a sequence whose items cannot be changed.
A string with no characters and length 0, represented by two quotation marks.
A part of a string specified by a range of indices.
An integer value used to select an item in a sequence, such as a character in a string. In Python indices start from 0.
One of the values in a sequence.
An ordered collection of values where each value is identified by an integer index.
Something a variable can refer to. For now, you can use “object” and “value” interchangeably.
A general process for solving a category of problems.
A loop in which the terminating condition is never satisfied.
Repeated execution of a set of statements using either a recursive function call or a loop.
An update that decreases the value of a variable.
An update that increases the value of a variable (often by one).
An assignment that gives an initial value to a variable that will be updated.
An assignment where the new value of the variable depends on the old.
Assigning a new value to a variable that already exists.
A programming pattern that uses a conditional statement to check for and handle circumstances that might cause an error.
Code that is used during program development but is not part of the final version.
A program development plan intended to avoid debugging by adding and testing only a small amount of code at a time.
Part of a program that can never run, often because it appears after a return statement.
A variable used to store an intermediate value in a complex calculation.
A recursion that doesn’t have a base case, or never reaches it. Eventually, an infinite recursion causes a runtime error.
A conditional branch in a recursive function that does not make a recursive call.
The process of calling the function that is currently executing.
A statement that causes a function to end immediately and return to the caller.
A conditional statement that appears in one of the branches of another conditional statement.
A conditional statement with a series of alternative branches.
One of the alternative sequences of statements in a conditional statement.
A statement that consists of a header and a body. The header ends with a colon (:). The body is indented relative to the header.
The boolean expression in a conditional statement that determines which branch runs.
A statement that controls the flow of execution depending on some condition.
One of the operators that combines boolean expressions: and, or, and not.
One of the operators that compares its operands: ==, !=, >, <, >=, and <=.
An expression whose value is either True or False.
An operator, denoted with a percent sign (%), that works on integers and returns the remainder when one number is divided by another.
An operator, denoted //, that divides two numbers and rounds down (toward negative infinity) to an integer.
