Random numbers are useful for creating random behavior.

JavaScript has a `Math.random()`

function that generates a random decimal number between `0`

(inclusive) and not quite up to `1`

(exclusive). Thus `Math.random()`

can return a `0`

but never quite return a `1`

**Note**

Like Storing Values with the Equal Operator, all function calls will be resolved before the `return`

executes, so we can `return`

the value of the `Math.random()`

function.

Change `randomFraction`

to return a random number instead of returning `0`

.

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