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# 1.条件语句
num = 20
if num > 18:
print('num > 18')
num = 17
if num > 18:
print('num > 18')
else:
print('num < 18')
num = 18
if num > 18:
print('num > 18')
elif num == 18:
print('num == 18')
else:
print('num < 18')
# 2.循环语句
l = ['a', 'b', 'c']
for v in l:
print(v)
sum = 0
for x in range(101): # [0-100]
sum = sum + x
print(sum)
sum = 0
n = 99
while n > 0:
sum = sum + n
n = n - 2
print(sum)
# 3. break
n = 1
while n <= 100:
if n > 10: # 当n = 11时,条件满足,执行break语句
break # break语句会结束当前循环
print(n)
n = n + 1
# 4. continue
n = 0
while n < 10:
n = n + 1
if n % 2 == 0: # 如果n是偶数,执行continue语句
continue # continue语句会直接继续下一轮循环,后续的print()语句不会执行
print(n)
# 注意:如果遇到死循环,Ctrl+C退出程序,或者强制结束Python进程