Shell program to accept a string and display as shown in the following example, suppose str = “RAJESH”

# str.sh

# Program :         To accept a string and display as shown in the following example, suppose str = “RAJESH”

                    

					R
				R	A
			R	A	J
		R	A	J	E
	R	A	J	E	S
R	A	J	E	S	H

# Author :           sujith

# Date :              17/03/2015

echo "Enter the word to print"

read str

len=$(echo "$str" | wc -c)

a=`expr $len \* 2 - 2`

len=`expr $len - 1`

echo "len=$len"

i=1

while [ $i -le $len ]

do

        b=1

        while [ $b -le $a ]

        do

                echo -n " "

                b=`expr $b + 1`

        done

        a=`expr $a - 2`

        l=1

        while [ $l -le $i ]

        do

                ch=$(echo "$str" | cut -c$l)

                echo -n " $ch"

                l=`expr $l + 1`

        done

        echo " "

        i=`expr $i + 1`

done

Output:

[141740@localhost ~]$ sh str.sh

Enter the word to print

RAJESH

len=6

					R
				R	A
			R	A	J
		R	A	J	E
	R	A	J	E	S
R	A	J	E	S	H

[141740@localhost ~]$