linux script

[linrio]

python script

[linrio]

replace_reg = re.compile(r'0.\d+')
:complie the regular expression to Regular Expression Objects replace_reg

[linrio]

SHELL Script

1. if

#! /bin/bash

read -p "Please input your score: " a 
if ((a < 60)) ; then
    echo "You didn`t pass the exam."
else
    echo "good! You passed the exam."
fi

1. elif

#! /bin/bash

read -p "Please input your score: " a 
if ((a < 60)) ; then
    echo "You didn`t pass the exam."
elif ((a > 60)) && ((a < 85)); then
    echo "Good! You passed the exam."
else
    echo "Very good! Your score is very high!"
fi

-lt ( < )（小于），-gt ( > )（大于），-le ( <= )（小于等于），-ge ( => )（大于等于），-eq ( = )（等于），-ne ( != )（不等于）

[linrio]

for and while

1.makelll.shfile
2.chmod +x lll.sh

1.for

#! /bin/bash

for i in $(seq 6 10);
do
        echo $i
done

2.while

#! /bin/bash

a=10
while [ "$a" -ge 0 ];
do
        echo "$a"
        a=$[$a-1]
done