removed blankspace from dir names

Task_1/calculator.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+
+if [[ "$1" == "--help" ]]
+then
+	echo "Following options are aviable:
+	add
+	add <int1> <int2>
+	sub
+	sub <int1> <int2>
+	mult
+	mult <int1> <int2>
+	div
+	div <int1> <int2>
+	cross
+	cross <int>
+	"
+elif [[ "$1" == "cross" ]]
+then
+	sum=0
+	if [[ $2 ]]
+	then
+		# grep only digits
+		for digit in $(echo "$2" | grep -o [0-9])
+		do
+		    sum=$((sum + digit))
+		done
+		echo "Crosssum of $2 = $sum"
+	else
+		read -p "Enter an integer: " n1
+		for digit in $(echo "$n1" | grep -o [0-9])
+		do
+		    sum=$((sum + digit))
+		done
+		echo "Crosssum of $n1 = $sum"
+	fi
+elif [[ "$1" == "add" ]]
+then
+	if [[ $2 && $3 ]]
+	then
+		echo "$2 + $3 = $(($2+$3))"
+	else
+		read -p "Enter 1st integer: " n1
+		read -p "Enter 2nd integer: " n2
+		echo "$n1 + $n2 = $(($n1+$n2))"
+	fi
+elif [[ "$1" == "sub" ]]
+then
+	if [[ $2 && $3 ]]
+	then
+		echo "$2 - $3 = $(($2-$3))"
+	else
+		read -p "Enter 1st integer: " n1
+		read -p "Enter 2nd integer: " n2
+		echo "$n1 - $n2 = $(($n1-$n2))"
+	fi
+elif [[ "$1" == "mult" ]]
+then
+	if [[ $2 && $3 ]]
+	then
+		echo "$2 * $3 = $(($2*$3))"
+	else
+		read -p "Enter 1st integer: " n1
+		read -p "Enter 2nd integer: " n2
+		echo "$n1 * $n2 = $(($n1*$n2))"
+	fi
+elif [[ "$1" == "div" ]]
+then
+	if [[ $2 && $3 ]]
+	then
+		echo "$2 / $3 = $(($2/$3))"
+	else
+		read -p "Enter 1st integer: " n1
+		read -p "Enter 2nd integer: " n2
+		echo "$n1 / $n2 = $(($n1/$n2))"
+	fi
+fi