Write a single line of code displaying the number 42.
In this exercise you'll learn to use a function by trying the
A function is a named thing that does something specific:
lenfunction measures the thing we give to it,
The syntax to make a function work is called a "function call", to make
"Hello world" the syntax is:
I'm not asking to print the string "42", (composed of two chars), but the number 42.
Don't hesitate to hit the "Submit" button, do as many test as you
like, until you feel confident you understand how
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