Challenge 1 — Solution

Task: Create a slice named temps containing the floats 18.5, 22.0,
15.5, then use append to add 30.0 and 27.5 (in one call). Print the
final slice and its length using len().

package main

import "fmt"

func main() {
	temps := []float64{18.5, 22.0, 15.5}

	temps = append(temps, 30.0, 27.5)

	fmt.Println(temps)
	fmt.Println(len(temps))
}


Expected output:

[18.5 22 15.5 30 27.5]
5

Notes:
- append can take multiple new values in a single call, separated by
  commas — temps doesn't need two separate append calls.
- temps = append(...) reassigns temps to the result; without the
  reassignment, the two new values would be discarded since append
  never modifies a slice in place.
- Go prints whole-number floats like 22.0 as just 22 by default with
  Println — the value itself is still a float64, only the display
  drops the trailing zero.