// An highlighted block
try:
num = int(input("來個數:"))
except Exception as result:
print("~~~~")
print(num)
使用try進行異常捕獲,若成功捕獲到異常,則num變量沒有成功建立,後面也無法使用num進行操作。
num = None
try:
num = int(input("來個數:"))
except Exception as result:
num = None
print("~~~~")
print(num)