keep string variables that have certain number of digits

[annettepelkmans]

Hello everyone!
Could someone please help me keep the observations with 8-digit numbers? The variable is the HS product code, but I only want to keep the most disaggregated chapter (8-digit)

product
01
0101
010110
01011010
01011090
010111

Thanks in advance,
Annette

[Ali Atia]

keep if strlen(product)==8

If this doesn't work, please provide a more realistic sample of your data by using the dataex command to generate it and then pasting the output in a reply to this post.

[annettepelkmans]

It worked perfectly! Thanks Ali Atia!