Talk:Determine if a string is numeric
Unix shell
#!/bin/sh
a='123'
if [ "$a" -eq "$a" ] 2>/dev/null
then
echo "a is numeric"
else
echo "a is abnumeric"
fi
#!/bin/sh
a='123'
if [ "$a" -eq "$a" ] 2>/dev/null
then
echo "a is numeric"
else
echo "a is abnumeric"
fi