gh

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# echo "Mayank"
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: 'echo "2115000613"
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echo "85.7"
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echo -e "Mayank \n 2115000613 \n 85.7"
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echo -e "Mayank \t 2115000613 \t 85.7"
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echo "Enter name"
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read name
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echo "Enter roll number"
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read rollnumber
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echo "my name is $name and roll number is $rollnumber "
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a=10
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echo $a
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a=20
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unset a
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echo $a
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echo "current working directory"
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whoami
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echo "listing of files"
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echo "calendar"
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cal '
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# echo "today's date"
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# date "+%D"
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# pwd
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: 'echo "first args: $1"
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echo "second args: $2"
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echo "third args: $3"
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echo "total args: $#"
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echo "process name: $0"
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echo "process id: $$"
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echo "argument: $@"
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echo "args: $*" 
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a=5
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b=3
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c=`expr $a \* $b`
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echo $c '
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# read two no. and perform all airthematic operation
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# input 3 no. by command line argument and perform above wala
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# find avg. of three no.
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: 'echo "enter value of a"
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read a
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echo "enter value of b"
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read b
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c=`expr $a + $b`
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echo $c
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d=`expr $a - $b`
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echo $d
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e=`expr $a / $b`
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echo $e
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f=`expr $a \* $b`
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echo $f '
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: 'echo "firstargs: $1"
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echo "secondargs: $2"
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echo "thirdargs: $3"
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c=`expr $1 + $2 + $3`
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echo $c
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d=`expr $1 - $2 - $3`
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echo $d
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e=`expr $1 / $2 / $3`
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echo $e
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f=`expr $1 \* $2 \* $3`
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echo $f '
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: 'echo "enter value of a"
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read a
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echo "enter value of b"
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read b
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echo "enter value of c"
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read c
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sum=`expr $a + $b + $c `
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avg=`echo "scale=2 ; $sum / 3" | bc`
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echo $avg '
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# THERE must be spaces b/w operation and expressions
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# all the conditional expressions should be inside square braces with spaces around them
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# read a
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# read b
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# read c
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# if [ $a -gt $b ]
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# then
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# if [ $a -gt $c ]
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# then
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# echo "a"
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# else
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# echo "c"
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# fi
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# else
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# if [ $b -gt $c ]
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# then
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# echo "b"
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# else
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# echo "c"
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# fi
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# fi
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# read a
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# read b
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# read c
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# sum=`expr $a + $b + $c `
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# avg=` echo "scale=0 ; $sum / 3" | bc `
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# if [ $avg -ge 80 ]
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# then
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# echo "first div."
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# elif [ $avg -ge 65 -a $avg -lt 80 ]
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# then
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# echo "second div."
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# elif [ $avg -ge 45 -a $avg -lt 65 ]
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# then
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# echo "third div."
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# else
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# echo "fail"
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# fi
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# read var
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# case $var in
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# 1) echo "monday";;
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# 2) echo "tuesday";;
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# 3) echo "wednesday";;
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# 4) echo "thrusday";;
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# 5) echo "friday";;
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# 6) echo "saturday";;
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# 7) echo "sunday";;
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# *) echo "wrong input";;
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# esac
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# print no. from 1 to 10 
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# print the multiplication table of a given no.
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# write a program to check a no. is palindrom or not
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# write a program to compute m^n
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# write a program to read student name roll no. in the same line and then write the line to a file student.txt it then prompts you for more entries
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# i=1
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# while [ $i -le 10 ]
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# do
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# echo "$i"
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# i=`expr $i + 1`
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# done
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# read a
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# i=1
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# while [ $i -le 10 ]
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# do
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# f=`expr $a \* $i`
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# echo "$f"
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# i=`expr $i + 1`
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# done
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# read a
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# o=$a
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# sum=0
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# while [ $a -gt 0 ]
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# do
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# r=`expr $a % 10 `
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# sum=`expr $sum \* 10 + $r `
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# a=`expr $a / 10 `
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# done
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# if [ $o -eq $sum ]
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# then
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# echo "palindrom"
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# else
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# echo "not palindrom"
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# fi
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# read a
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# read b
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# x=1
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# while [ $b -gt 0 ]
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# do
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# x=`expr $x \* $a `
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# b=`expr $b - 1 `
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# done
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# echo "$x"
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# echo "enter details"
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# read input
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# while [ "$input" != quit ]
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# do
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# echo "$input" >> student.txt
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# read input
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# done
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# echo "finish"
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filename="bash.string.txt"
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echo ${filename%.*}
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echo ${filename#*.}
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