Decisions with if 🤔

Smart machines make decisions. A greenhouse opens its windows when it gets too hot. A recycling robot sorts bottles from trash. They all use if.

temperature = 35

if temperature > 30:
    print("Too hot - open the windows!")
else:
    print("Just right")

• if checks something. If it's true, Python runs the indented lines under it.
• else runs when the check is false.
• Don't forget the colon : at the end of the if and else lines!

Comparing things

💡

⚠️ One = puts something in a box. Two == asks if two things are the same.

♻️ A recycling robot

item = "bottle"

if item == "bottle":
    print("Recycling bin")
else:
    print("Trash bin")

🌧️ Weather warnings

rain_mm = 60

if rain_mm > 50:
    print("Flood warning!")
else:
    print("Normal rain")

🌍 Fun fact

Weather apps use code full of ifs. If the wind is very strong, then send a storm alert. Your phone does this kind of thinking millions of times a day!