Outcomes3Work out the boolean value of a logic expression
Express decision making logic in boolean logic
Using if / switch statement to express conditional
instructions
Syntax Summary4Keywordsif, else, switch, case,
default,Punctuators(){}:? :Operators==, !, !=, >, >=,
1&&bless than or equal to =Equality operatorsequal to==not
equal to!=Logical operatorslogical not!logical and&&logical
or||PS: Expressions with above operators have a true or false
value.Precedence & associativity of popular operators11Operator
precedence (high to low)Associativity*/%Left to right+-Left to
right=Left to right==!=Left to right&&Left to right||Left
to right?:Right to leftConditional statements12In decision making
process, logical value can be used to determine the actions to
take.
E.g. If it is raining, then bring an umbrellaIf AC1 canteen is
too crowded, then go to AC2/AC3 for lunch
In programming, certain statements will only be executed when
certain condition is fulfilled. We call them conditional
statements.Conditional statement: if13One statement will be
executed if the condition is trueSyntax:if (logical expression)
statement;
