The Internet and the Web

Lecture Summary 8

Prepared by: Anthony Larrain

These notes serve as an outline to the lecture, they are not intended to be complete.

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Conditional Execution

• Want code to execute based on some condition.
if you rolled a 7 output you won else you lost if (dice == 7) { alert("you won"); }else{ alert("you lost"); } if temperature greater than 80 print it's hot else print not hot if( temperature > 80) { alert("its hot"); }else { alert("Not hot"); } if your percent is bigger than or equal to 90 you get an A else if your percent is bigger than or equal to 80 you get a B else if your precent is bigger than or equal to 70 you get a C else you fail if( percent >= 90 ){ alert("you get an A") } else if( percent >= 80 ){ alert("you get a B") } else if( percent >= 70 ){ alert("you get a C") } else { alert("you fail"); }
• The general form of an if statement is.

if( BOOLEAN_TEST) {
    STATEMENTS_EXECUTED_IF_TRUE
}
else{
    STATEMENTS_EXECUTED_IF_FALSE
}

Relational Operators

Relational Operator	Definition
==	equal to
!=	not equal to
<	less than
<=	less than or equal to
>	greater than
>=	greater than or equal to

Logical Operators

&&  and
||  or
!   not