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# 基础
# 2.变量
# 标识符命名
# 数据类型
# 对象 Python 是强(Strongly)面向对象的,因为所有的一切都是对象, 包括数字、字符串与 函数。
# 案例:使用变量与字面常量
i = 5
print(i)
i = i + 1
print(i)
# 变量只需被赋予某一值。不需要声明或定义数据类型
print('''This is a multi-line string.
this is the second line.''')
# 逻辑行与物理行 这三句等价 在python 最好不要使用;分号 可以用\代替多行输出
i = 5; print(i);
i = 5;
print(i);
i = 5; print(i)
s = 'This is a string. \
This continues the string.' # 显式行连接(Explicit Line Joining)
print(s)
'''
j = 5
# 下面将会发生错误 注意行首有一个空格 # 缩进错误:意外缩进
print('value is', j) # IndentationError: unexpected indent # 缩进错误:意外缩进
print('I repeat, the value is', j)
'''
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