bash shell nested for loop

bash shell nested-loops
rashok picture rashok · Jan 31, 2011 · Viewed 138.7k times · Source

I want to write a nested for loop that has to work in the bash shell prompt. nested for loop in Single line command.

For example, 

for i in a b; do echo $i; done
a
b

In the above example, for loop is executed in a single line command right. Like this I have tried the nested for loop in the shell prompt. Its not working. How to do this. Please update me on this.

Answer

Daniel picture Daniel · Jan 31, 2011

The question does not contain a nested loop, just a single loop. But THIS nested version works, too:

# for i in c d; do for j in a b; do echo $i $j; done; done
c a
c b
d a
d b

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