二、python学习笔记-循环判断-while语句

"""while语句格式
while 判断条件：
    语句
"""

# 循环加法
n = 100

sum1 = 0
counter = 1
while counter <= n:
    sum1 = sum1 + counter
    counter += 1

print("1 到 %d 之和为: %d" % (n, sum1))

# 死循环，当while的条件永远为True就是死循环
"""
while 1 == 1:
    pass
"""

# 一般写成下面的格式
"""
while True:
    pass
"""
# 在 while … else 在条件语句为 false 时执行 else 的语句块：

count = 0
while count < 5:
    print(count, " 小于 5")
    count = count + 1
else:
    print(count, " 大于或等于 5")

i = 1
while i < 10:
    j = 1
    while j < i+1:
        print('{} * {} = {}'.format(j, i, i*j), end='\t')
        j += 1
    print()
    i += 1