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1行に数値のみを記載されたテキストの合計値を出力する
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| #!/bin/sh | |
| sum=0 | |
| while read line | |
| do | |
| sum=`expr $sum + $line` | |
| done < num.txt |
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| #/bin/bash | |
| cat <<EOF > num.txt | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| EOF | |
| awk '{v+=$1} END {print v}' nums.txt |
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shellでは数値計算をexprを使って行う。
lineが数として変換できないとエラーとなる。
空行でもエラーとなるので注意する。