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Introduction to JavaScript
Properties
When you introduce a new piece of data into a JavaScript program, the browser saves it as an instance of the data type. Every string instance has a property called length
that stores the number of characters in that string. You can retrieve property information by appending the string with a period and the property name:
console.log('Hello'.length); // Prints 5
The .
is another operator! We call it the dot operator.
In the example above, the value saved to the length
property is retrieved from the instance of the string, 'Hello'
. The program prints 5
to the console, because Hello
has five characters in it.
Instructions
1.
Use the .length
property to log the number of characters in the following string to the console:
'Teaching the world how to code'