20180617h

exceptions

import strformat
import strutils

proc input(text: string = ""): string =
stdout.write(text)
stdin.readLine()

try:
let age = input("Your age: ").parseInt()
echo &"Next year you'll be {age+1}"
except ValueError:
echo "That's not a number!"

Output:

Your age: 28
Next year you'll be 29

Your age: Lac
That's not a number!

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Page last modified on 2018 June 17, 12:00