输入语句 输入数值

?x=input(‘please input a number:’)
please input a number:22
x = 22

输入字符串

?x=input(‘please input a string:’,’s’)
please input a string:this is a string
x = this is a string

输出语句 自由格式 (disp)

?disp(23+454-29*4)
361
?disp([11 22 33; 44 55 66; 77 88 99])
11 22 33
44 55 66
77 88 99


?disp(‘this is a string’)
this is a string


格式化输出 (fprintf)

 fprintf(‘The area is %8.5f
‘, area) % 注意输出格式前须有%符号，

%跳行符号须有符号The area is 12.56637

%8.5f 输出值为8位数含5位小数

错误消息显示命令?error(‘this is an error’)??? this is an error