Copy some selects into another variable

[Gladis6680]

Sample Data:

I would like to know how to copy values of MILK from B to C

OBS	A	B	C
1	COFFEE	$16.80	$16.80
2	COFFEE	$27.14	$27.14
3	COFFEE	$49.20	$49.20
4	COFFEE	$65.00	$65.00
5	COFFEE	$66.70	$66.70
6	MILK	$38.46	$0.00
7	MILK	$128.20	$0.00
8	MILK	$66.50	$0.00
9	MILK	$32.05	$0.00
10	MILK	$30.06	$0.00
11	MILK	$14.85	$0.00
12	TEA	$34.60	$34.60
13	TEA	$1.73	$1.73
14	TEA	$70.93	$70.93
15	TEA	$6.92	$6.92
16	EXPRESSO	$34.60	$0.00
17	EXPRESSO	$10.38	$0.00
18	EXPRESSO	$17.30	$0.00

[Reeza · Accepted solution]

data want;
set have;

if a = 'MILK' then C = B;

run;

You can use a conditional IF statement. 

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@Gladis6680 wrote:

Sample Data:

I would like to know how to copy values of MILK from B to C

OBS	A	B	C
1	COFFEE	$16.80	$16.80
2	COFFEE	$27.14	$27.14
3	COFFEE	$49.20	$49.20
4	COFFEE	$65.00	$65.00
5	COFFEE	$66.70	$66.70
6	MILK	$38.46	$0.00
7	MILK	$128.20	$0.00
8	MILK	$66.50	$0.00
9	MILK	$32.05	$0.00
10	MILK	$30.06	$0.00
11	MILK	$14.85	$0.00
12	TEA	$34.60	$34.60
13	TEA	$1.73	$1.73
14	TEA	$70.93	$70.93
15	TEA	$6.92	$6.92
16	EXPRESSO	$34.60	$0.00
17	EXPRESSO	$10.38	$0.00
18	EXPRESSO	$17.30	$0.00

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[Gladis6680]

Thank you so much.