operator.hlp

来自「是一个经济学管理应用软件 很难找的 但是经济学学生又必须用到」· HLP 代码 · 共 44 行

{smcl}
{* 05apr2005}{...}
{cmd: help operators}
{hline}

{title:Title}

{pstd}
{hi:[U] 13 Functions and expressions} {hline 2} Operators in expressions


{title:Syntax}

					   {col 58}Relational
	 Arithmetic       {col 34}Logical   {col 53}(numeric and string)
    {hline 20}{col 30}{hline 18}{col 53}{hline 21}
     {cmd:+}   addition      {col 34}{cmd:~}   not{col 56}{cmd:>}   greater than
     {cmd:-}   subtraction   {col 34}{cmd:!}   not{col 56}{cmd:<}   less than
     {cmd:*}   multiplication{col 34}{cmd:|}   or {col 56}{cmd:>=}  > or equal
     {cmd:/}   division      {col 34}{cmd:&}   and{col 56}{cmd:<=}  < or equal
     {cmd:^}   power                              {col 56}{cmd:==}  equal
				  		  {col 56}{cmd:~=}  not equal
     {cmd:+}   string concatenation               {col 56}{cmd:!=}  not equal

{pstd}Note that a double equal sign ({cmd:==}) is used for equality testing.


{title:Examples}

{phang}{cmd:. generate newvar = oldvar*myvar-3}

{phang}{cmd:. replace myvar = this/that if thatvar==3}


{title:Also see}

{psee}
Manual:  {bf:[U] 13 Functions and expressions},{break}
{bf:[U] 13.2 Operators}

{psee}
Online:  {help exp}, {help functions}; {helpb egen}, {helpb generate}
{p_end}