1) Create a function which takes an integer parameter called

`limit`

2) Inside the function:

2.1) Create a variable called

`sum`

and set it to zero.2.2) Run a loop from 0 to

`limit`

inclusively.2.3) Inside the loop:

2.3.1) If the loop variable is a multiple of 3, add it to

`sum`

2.3.2) Otherwise, if it's a multiple of 5, add it to

`sum`

2.4) After the loop, return

`sum`

Hint: you can use the modulus operator to check for multiples of

`n`

Give it a try, it's a pretty simple task!