Editing Conditional (computer programming) (section)

=== JavaScript ===
[[JavaScript]] uses if-else statements similar to those in [[C syntax|C]] languages. A Boolean value is accepted within parentheses between the reserved ''if'' keyword and a left curly bracket.
<syntaxhighlight lang="javascript">
if (Math.random() < 0.5) {
  console.log("You got Heads!");
} else {
  console.log("You got Tails!");
}
</syntaxhighlight>
The above example takes the conditional of <code>Math.random() < 0.5</code> which outputs <code>true</code> if a random float value between 0 and 1 is greater than 0.5. The statement uses it to randomly choose between outputting <code>You got Heads!</code> or <code>You got Tails!</code> to the console. Else and else-if statements can also be chained after the curly bracket of the statement preceding it as many times as necessary, as shown below:
<syntaxhighlight lang="javascript">
var x = Math.random();
if (x < 1/3) {
  console.log("One person won!");
} else if (x < 2/3) {
  console.log("Two people won!");
} else {
  console.log("It's a three-way tie!");
}
</syntaxhighlight>