count the number of nonzero value of a variable by month

[Nieves]

Hello SAS expert,

I have a dataset as follows and I want to create a variable count_var1 that reports the number of nonzero value of var1 for each month

month var1

1        5

1        0

1        3

2        0

2        7

2        0

3        9

3        0

3        6

4       10

4        0

4        0

5        7

5        4

5        0

6        8

6        7

6        9

so count_var1 would be

month count_var1 

1        2

2        1

3        2

4        1

5        2

6        3

May I ask you kind help on how to implement this ? 

Thanks 

[Jagadishkatam]

proc sql;
create table want as select month,count(var1) as count_var1 from have where var1 ne 0 group by month;
quit;

[Reeza]

Proc freq data = have;

where var1 ne 0;

table month /out = want ;

run;