Prijať vstup len vtedy, ak správne hodnoty, kde zadali predtým
Príklady kódu
python skontrolujte, či príkon() dáva chybu
try:
# Note: Python 2.x users should use raw_input, the equivalent of 3.x's input
age = int(input("Please enter your age: "))
except ValueError:
print("Sorry, I didn't understand that.")
else:
if age >= 18:
print("You are able to vote in the United States!")
else:
print("You are not able to vote in the United States.")
python skontrolovať, ak chce vykonať funtion
while True:
try:
age = int(input("Please enter your age: "))
except ValueError:
print("Sorry, I didn't understand that.")
continue
if age < 0:
print("Sorry, your response must not be negative.")
continue
else:
#age was successfully parsed, and we're happy with its value.
#we're ready to exit the loop.
break
if age >= 18:
print("You are able to vote in the United States!")
else:
print("You are not able to vote in the United States.")Podobné stránky
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