How do I stop people typing the wrong thing?

Q: How do I stop people typing the wrong thing?

Start with the Ask block's They type setting. Choose A whole number for an age, A number for a price, or Words for a name. Anything that doesn't fit is asked again, before your program sees it. For your own rules, like an age from 1 to 120 or a yes-or-no answer, check it with blocks: Repeat While the answer is wrong, Tell them what to type, then Ask again. The Check the Age example does exactly this.

Start with the Ask block's They type setting. Choose A whole number for an age, A number for a price, or Words for a name. Anything that doesn't fit is asked again, before your program sees it.

For your own rules, like an age from 1 to 120 or a yes-or-no answer, check it with blocks: Repeat While the answer is wrong, Tell them what to type, then Ask again. The Check the Age example does exactly this.

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Open it in the editor and run it, then change it and see what happens.

ExampleAsk until it's 1 to 10 Try it

Start
Ask “Pick a number from 1 to 10” and store the answer in n
Repeat while n < 1 || n > 10
Repeat →
1. Tell "That is not from 1 to 10. Try again."
2. Ask “Pick a number from 1 to 10” and store the answer in n
back to the top for the next lap
Tell "You picked " + n
End

You type4It showsYou picked 4

You type1207It showsThat is not from 1 to 10. Try again.That is not from 1 to 10. Try again.You picked 7

1n = int(input("Pick a number from 1 to 10 "))2while n < 1 or n > 10:3    print("That is not from 1 to 10. Try again.")4    n = int(input("Pick a number from 1 to 10 "))5print("You picked " + str(n))

How do I stop people typing the wrong thing?

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How do I stop people typing the wrong thing?

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