征集100种求和(从1加到100)的方法!

joe9i0

CUer的能力的无限的,大家进来尽情的释放吧!!!
我先来抛个砖!随手写的,期待大家来砸玉,秀出更强的代码!!!

1. echo $((`seq -s+ 1 100`))

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1. seq -s+ 1 100 | bc

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1. 
   
2. #!/bin/bash
   
3. num=1
   
4. sum=0
   
5. while [ $num -le 100 ]
   
6. do
   
7.     sum=$(($num+$sum))
   
8.     num=$(($num+1))
   
9. done
   
10. echo "sum=$sum"
    

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cu_little_bird

for i in 1..100;do let "sum=$sum +$i";echo "sum=$sum";done

惟吾无为

坐等awk ,sed版..

cu_little_bird

#!/usr/bin/perl -w
use strict;
my $sum;
foreach (1..100){
$sum +=$_;
}
print "sum=$sum";

yinyuemi

awk 'BEGIN{print (1+100)*100/2}'
5050

jason680

$ echo 0 +{1..100} | bc
5050

$ echo 5050
5050

$ echo '(1+100)*100/2' |bc
5050

joe9i0

awk 'BEGIN{print (1+100)*100/2}'
5050
yinyuemi 发表于 2011-09-25 11:58

   

这................

Shell_HAT

1. awk 'BEGIN{for(i=1;i<=100;i++)sum+=i;print sum}'

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jason680

$ min=1;max=100

$ echo "($max-$min+1)*($min+$max)/2" | bc
5050