# Calculate N!

echo \$(( \$(echo 1 "* "{2..10}) ))

2
2011-02-10 17:09:28

## 4 Alternatives + Submit Alt

• 8
seq -s* 10 |bc
· 2011-02-10 08:03:19

• 1
seq 10 | paste -sd* | bc
· 2011-02-09 19:56:12
• Same as the seq/bc solution but without bc.

1
echo \$((\$(seq -s* 10)))
· 2011-02-10 18:44:53
• More readable version of factorial calculation using standard desktop calculator instead of bc.

0
dc -e '10 [q]sq[dd1=q1-lxx*]dsxxp'
· 2011-02-16 19:00:21

### What Others Think

calculates N! for values between 2 and 25. `echo \$(( \$(echo 1 "* "{2..26}) ))` -1569523520172457984 Kinda interesting. I'd be impressed if you could make a pascal's triangle in a one liner...
bartonski · 476 weeks and 5 days ago
Interesting? I guess you are running a super computer.
RanyAlbeg · 476 weeks and 5 days ago
Sorry. No supercomputers here. I did find the use of `"* "{2..10}` to create `* 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10` to be somewhat novel.
bartonski · 476 weeks and 5 days ago
the pascal's triangle is a hard task... but i'm trying... I'm so close... `lines=6; eval echo -e "{1..\$lines}\\\n" | while read i; do eval "array\$i=( \$(echo {1..\$i} ) ); echo \\${array\$((i-1))[@]}"; done;` with this I can recover the array from previous line... with some more work I can do it.
glaudiston · 476 weeks and 5 days ago
@glaudiston I've solved it with a couple of nested for loops, but I'm still waiting for my command to be moderated.
flatcap · 476 weeks and 5 days ago
@bartonski, done, a one line pascal's triangle; `l=10;for((i=0;i<\$l;i++));do eval "a\$i=(\$(pv=1;v=1;for((j=0;j<\$l;j++));do [ \$i -eq 0 -o \$j -eq 0 ]&&{ v=1 && pv=1; }||v=\$((pv+a\$((i-1))[\$((j))]));echo -n "\$v ";pv=\$v;done;));";eval "echo \"\\${a\$i[@]}\"";done | column -t;`
glaudiston · 476 weeks and 4 days ago

### What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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