Conditional

In a conditional statement or expression the value of a condition determines which alternative pieces of code to execute.

Related concepts:  StatementExpressionControl Flow

Closest Wikipedia entry:  Conditional (computer programming)

Misconceptions about Conditional

23 documented Misconceptions

BaseCaseNotNeeded — Java

Recursive computations do not necessarily need a base case

BaseCaseNotNeeded — Scratch

Recursive computations do not necessarily need a base case

ConditionOneOutEdge — Java

A condition node in a control-flow graph can have a single outgoing edge

ConditionalIsSequence — Java

If-else is equivalent to sequence of two ifs

ConditionalIsSequence — Scratch

If-then-else block is equivalent to sequence of two if-then blocks

ConditionalIsSequence — Python

If-else is equivalent to sequence of two ifs

ConditionalOperatorNotExpression — JavaScript

The conditional operator is not an expression

ElsIf — Java

There is an elsif keyword for multi-way conditional statements

ElseAlwaysExecutes — Java

The else branch of an if-else statement always executes

ElseAlwaysExecutes — Scratch

The else branch of an if-then-else block always executes

ForIsConditional — Java

The body of a for statement executes at most once

IfIsLoop — Java

The body of an if statement executes repeatedly, as long as the condition holds

IfIsLoop — Python

The body of an if-statement executes repeatedly, as long as the condition holds

IfRequiresElse — Java

Every if statement requires an else

LoopTerminatingCondition — Java

For and while loops end when the condition becomes true

MapToBooleanWithConditionalOperator — Java

To map a boolean expression to a boolean, a conditional operator is necessary

MapToBooleanWithIf — Java

To map a boolean expression to a boolean, an if statement is necessary

MapToBooleanWithIf — Python

To map a boolean expression to a bool, an if statement is necessary

MapToBooleanWithTernaryOperator — Python

To map a boolean expression to a bool, a ternary conditional operator is necessary

MissingElseTerminates — Scratch

Blocks following an if without else will not execute if the condition is false

RecursiveFunctionNeedsIfElse — Python

A recursive function needs to contain an if-else statement

RecursiveMethodNeedsIfElse — Java

A recursive method needs to contain an if-else statement

StatementMultipleOutEdges — Java

A non-condition node in a control-flow graph can have multiple outgoing edges