Question about loops

[Luiza Martins]

Hello everyone!
I was wondering if anybody could help me remember how to create a loop in stata.
I am trying to run the following command:

gen tipo_disciplina=.
replace tipo_disciplina= "calculo" if id_disciplina=="2000MAT0111"
replace tipo_disciplina= "calculo" if id_disciplina=="2001MAT0111"
replace tipo_disciplina= "calculo" if id_disciplina=="2002MAT0111"
replace tipo_disciplina= "calculo" if id_disciplina=="2003MAT0111"
replace tipo_disciplina= "calculo" if id_disciplina=="2004MAT0111"
replace tipo_disciplina= "calculo" if id_disciplina=="2005MAT0111"
replace tipo_disciplina= "calculo" if id_disciplina=="2006MAT0146"
replace tipo_disciplina= "calculo" if id_disciplina=="2007MAT0146"
replace tipo_disciplina= "calculo" if id_disciplina=="2008MAT0146"
replace tipo_disciplina= "calculo" if id_disciplina=="2009MAT0146"
replace tipo_disciplina= "calculo" if id_disciplina=="2010MAT0146"
replace tipo_disciplina= "calculo" if id_disciplina=="2011MAT0146"
replace tipo_disciplina= "calculo" if id_disciplina=="2012MAT0146"
replace tipo_disciplina= "calculo" if id_disciplina=="2000MAT0121"
replace tipo_disciplina= "calculo" if id_disciplina=="2001MAT0121"
replace tipo_disciplina= "calculo" if id_disciplina=="2002MAT0121"
replace tipo_disciplina= "calculo" if id_disciplina=="2003MAT0121"
replace tipo_disciplina= "calculo" if id_disciplina=="2004MAT0121"
replace tipo_disciplina= "calculo" if id_disciplina=="2005MAT0121"
replace tipo_disciplina= "calculo" if id_disciplina=="2006MAT0147"
replace tipo_disciplina= "calculo" if id_disciplina=="2007MAT0147"
replace tipo_disciplina= "calculo" if id_disciplina=="2008MAT0147"
replace tipo_disciplina= "calculo" if id_disciplina=="2009MAT0147"
replace tipo_disciplina= "calculo" if id_disciplina=="2010MAT0147"
replace tipo_disciplina= "calculo" if id_disciplina=="2011MAT0147"
replace tipo_disciplina= "calculo" if id_disciplina=="2012MAT0147"

I know there is someway to make it more efficient by creating a loop but I am having problems with the codes.

Thank you in advance!

[Jorrit Gosens]

*some sample data:
clear
input str11 id_disciplina
"2000MAT0111"
"2001MAT0111"
"2002MAT0111"
"2003MAT0111"
"2004MAT0111"
"2005MAT0111"
"2006MAT0146"
"2007MAT0146"
"2008MAT0146"
"2009MAT0146"
"2010MAT0146"
"2011MAT0146"
"2012MAT0146"
"2000MAT0121"
"2001MAT0121"
"2002MAT0121"
"2003MAT0121"
"2004MAT0121"
"2005MAT0121"
"2006MAT0147"
"2007MAT0147"
"2008MAT0147"
"2009MAT0147"
"2010MAT0147"
"2011MAT0147"
"2012MAT0147"
end
gen tipo_disciplina=1234

foreach year of numlist 2000/2005{
    foreach no in 0111 0121{
        replace tipo_disciplina=. if id_disciplina=="`year'MAT`no'"
    }
}

foreach year of numlist 2006/2012{
    foreach no in 0146 0147{
        replace tipo_disciplina=. if id_disciplina=="`year'MAT`no'"
    }
}