Invalid Syntax while looping

[Lorena Alzamora]

hello, i dont know why stata keeps me showing invalid syntax in this loop:

foreach x of p524a1_14 p524a1_15 p524a1_16 p524a1_17 p524a1_18{
summ `x'
gen ING_`x' = (`x'-r(mean))/r(sd)
}

i tried with an space just before the "{" and every way but i cant do it
please send your suggestion
thank you so much

[Ken Chui]

Try replace the "of" in the first line with "in".

[Nick Cox]

Ken Chui is right as usual.

See the help for foreach

of is a keyword and must always be followed by another acceptable keyword, in this case varlist or an acceptable abbreviation thereof.

[Lorena Alzamora]

Thank you Ken and Nick.