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Help with compare two column and print out column with smallest number

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# 1  
Old 02-26-2014
Help with compare two column and print out column with smallest number
Input file :
Code:
5 20
500 2
20 41
41 0
23 1

Desired output :
Code:
5 
2 
20
0
1

By comparing column 1 and 2 in each line, I hope can print out the column with smallest number.

I did try the following code, but it don't look good Smilie
Code:
awk '$1<$2{print $1}' input_file
5
20
awk '$2<$1{print $2}' input_file
2
0
1

Thanks for any advice.
# 2  
Old 02-26-2014
Code:
awk '{print $1<$2?$1:$2}' file

These 2 Users Gave Thanks to Subbeh For This Post:
perl_beginner Scrutinizer
# 3  
Old 02-26-2014
Nice Subbeh. It is better to add parentheses, since some awks regard the comparison as ambiguous:
Code:
awk '{print ($1<$2)?$1:$2}' file

or
Code:
awk '{print ($1<$2?$1:$2)}' file

These 2 Users Gave Thanks to Scrutinizer For This Post:
perl_beginner Subbeh
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