Python 之流程控制

一、判断语句

if __name__ == "__main__":
    a = 1
    b = 2
    if a == 1 and b == 1:
        print("ok")
    elif a == 2 and b == 2:
        print("error")
    else:
        print("other")

二、循环语句

if __name__ == "__main__":
    # while循环
    i = 0
    while i < 5:
        print("当前是第%d次执行循环" % (i + 1))
        print("i=%d" % i)
        i += 1

    # while嵌套循环
    i = 1
    while i <= 9:
        j = 1
        while j <= i:
            print("%d*%d=%-2d " % (j, i, i * j), end="")
            j += 1
        print("\n")
        i += 1

    # for 循环
    name = ""
    for x in name:
        print(x)
    else:
        print("没有数据")

三、break和continue

if __name__ == "__main__":
    name = "dongGe"
    for x in name:
        print("----")
        if x == "g":
            break
        print(x)

    i = 0
    while i < 10:
        i = i + 1
        print("----")
        if i == 5:
            continue
        print(i)