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q1/q1.sh

+#!/bin/bash
+a="$1"
+s=0
+x=0
+for ((i=1;i<=$((a));i++)); do
+	x=$((i*i))
+	s=$((s+x))
+done
+echo "$s"

q2/q2.sh

+#!/bin/sh
+path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
+
+cd "$path"
+
+cd "$1"
+
+ls -l | grep -c ^d

q3/q3.sh

+#! /bin/bash
+#input from q3_in.txt after sorting output in q3_in.txt
+grep "[5]" q3_in.txt | sort >q3_out.txt

q4/q4.sh

+#! /bin/bash
+
+filename='q4_in.txt'
+
+while read line; do
+read -a num <<< $line
+done < $filename
+
+tot=${#num[@]}
+sum=0
+
+for i in "${num[@]}"; do
+ #sum='echo $(printf "%.2f" $((sum+i)))
+ #sum='echo "$((sum+i)" | bc -l' printf '%0.3f' "$sum"
+ sum=$((sum+i))
+done
+
+mean=$((sum/tot))
+echo $mean
+
+for ((i = 0; i<tot; i++)) do
+ for((j = 0; j<tot-i-1; j++)) do
+  if [ ${num[j]} -gt ${num[$((j+1))]} ] 
+    then
+     temp=${num[j]} 
+     num[$j]=${num[$((j+1))]}   
+     num[$((j+1))]=$temp 
+  fi
+ done
+done
+
+if [ $((tot%2)) -eq 0 ]
+ then
+  ind=$((tot/2))
+  a=${num[ind]}
+  b=${num[$((ind-1))]}
+  echo $((((a+b))/2))
+ else
+  echo ${num[$((tot/2))]}
+fi

readme.txt

+Contributions:
+CSE Git usernames:
+ CSE GIT username snehlatayadav
+
+
+q1: Pooja Gayakwad (203050076)
+q2: Sanjna Mohan (20305R006)
+q3: Snehlata Tadav (203050075)
+q4: Manjusree M P (203059007)
+
+
+
+References:
+
+https://stackoverflow.com/questions/2564634/convert-absolute-path-into-relative-path-given-a-current-directory-using-bash
+https://stackoverflow.com/questions/24112727/relative-paths-based-on-file-location-instead-of-current-working-directory
+https://unix.stackexchange.com/questions/273341/obtain-script-current-directory-so-that-i-can-do-include-files-without-relative
+https://code-maven.com/bash-shell-relative-path#:~:text=It%20needs%20to%20find%20its,the%20page%20about%20absolute%20path.&text=The%20point%20is%2C%20however%2C%20that,down%20the%20%22data%22%20direcotry.
+https://stackoverflow.com/questions/17648033/counting-number-of-directories-in-a-specific-directory
+https://www.linuxquestions.org/questions/programming-9/shell-script-help-how-to-pass-a-directory-path-to-the-script-668752/
+https://shapeshed.com/unix-wc/#:~:text=To%20count%20the%20number%20of%20folders%20and%20files%20in%20a,wc%20to%20give%20a%20count.
+https://stackoverflow.com/questions/24341686/passing-a-path-as-an-argument-to-a-shell-script
+https://ubuntu-maryland.org/presentations/reference_bash-cheat.pdf
+https://linuxconfig.org/bash-scripting-tutorial-for-beginners#h7-script-execution
+https://wiki.bash-hackers.org/syntax/shellvars#special_parameters_and_shell_variables
+https://devhints.io/bash
+https://linuxhint.com/read_file_line_by_line_bash/
+https://linuxhint.com/bash_split_examples/
+https://www.geeksforgeeks.org/sorting-the-array-in-bash-using-bubble-sort/