In this lesson we learned how to treat numbers and strings.

First, we learned how to store values returned from prompts, using the following commands:

1. Number.parseInt(value): Transforms the value to an integer.
2. Number.parseFloat(value): Transforms the value to a float.
3. Number(value): Tranforms the value to the type of the number passed as argument.

After that, we learned how to parse values to string:

1. String(value)
2. value.toString()

We also worked with templates strings using the ` signal to delimit strings and the ${value} operand to use variables as string.

Finally, we learned some functions to treat strings and numbers:

1. value.length: return the length of the string value.
2. value.toUpperCase(): sets all letters of the string value to upper case.
3. value.toLowerCase(): sets all letters of the string value to lower case.
4. value.toFixed(*numberOfDecimalCases).replace("whatIsGoingToBeReplaced", "Replacement")
5. value.toLocaleString('location', {style})

And the document.write(value) command.