INTERCHANGING TWO NUMBERS

Aim

To write a shell program to interchange two numbers using a temporary
    ‘variable and without using a temporary variable.

Algorithm

Using the Temporary Variable

1.Enter the two numbers.
  2.Declare the temporary variable ‘C’ and do tne tollowing assignments
      c=a, a=bandb=c.

3.Display the result.

Without using temporary variable

1.Enter the two numbers by using a and b variable.

2. Then using the expressions.
      a= a+b,b=a—banda=a-b, values areinterchanged.
  3.Display the result.

Program: 1

#Swap using Temporary variable echo “swapping using temporary variable”
echo “Enter a”
read a

echo “Enter b”

read b

c = $a

a = $b

b = $c

echo “After swapping”

echo “Number a is $a”

echo “Number b is $b”

Program : 2

#swap without Temporary variable
echo Swapping without using temporary variable echo Enter a
read a
echo Enter b
read b
a = expr $a + $b’
b = ‘expr $a - $b’
a = ‘expr $a - $b’
echo After swapping
echo a is $a
echo b is $b

Output

Swapping using temporary variable

Enter a

10

Enter b

15

After swapping ais 15
bis 10

Swapping without using temporary variable

Enter a

6

Enter b

7

After swapping ais7

b is 6

Result:

Thus the program is written and executed for swapping of two numbers.