From blocks to text: the same ideas in Python

Everything you can do in Scratch exists in Python — the same ideas, different notation.

Block	Python
say «Hi»	print("Hi")
set score to 0	score = 0
change score by 1	score = score + 1
repeat 10 times	for i in range(10):
forever	while True:
if <condition> then	if condition:
wait 1 second	time.sleep(1)
ask «Name?»	name = input("Name? ")

The new part is the indentation: in Scratch the block wraps around whatever belongs to the loop; in Python it is marked with four spaces.

The block program:

when green flag clicked
set score to 0
repeat 5 times
    change score by 2
    say score
say «Done!»

The same thing in Python:

score = 0
for i in range(5):
    score = score + 2
    print(score)
print("Done!")

Output: 2, 4, 6, 8, 10, Done!

Notice that print("Done!") sits outside the indentation, so it runs once. Had it been indented it would have printed five times. Indentation is not decoration — it is the program.