Shell Script to find the sum of n even numbers

Some Shell Script Examples

Let us look into how to write shell scripts to:

  1. Find the sum of the n natural number
  2. Swap the two values using only two variables
  3. To find the sum of n even numbers
  4. To print the multiplication table of a given number

The shell scripting is a programming through which we write several lines of command together to execute. We can either have extension .sh, .bash, etc. depending on the type of shell we use.

Here, let us look into shell scripts with extension .sh which is used with the Bourne Shell.

1. Find the sum of the n natural number

Sample Code:

#to find sum of n numbers
#! /bin/sh
echo "Enter n"
read n
i=1
sum=0
while [ $i -le $n ]
do
read p
sum=$(expr $sum + $p)
i=$(expr $i + 1)
done
echo $sum

Sample Output:

Shell script to print sum of n numbers
Shell script to print the sum of n numbers

 

2. Swap the two values using only two variables

Sample Code:

#!bin/sh
	echo 'Enter value of x'
	read x
	echo 'Enter value of y'
	read y
	y=$((y+x))
	x=$((y-x))
	y=$((y-x))
	echo "The value of x and y after swap is x=$x and y=$y"

Sample Output:

Shell script to swap values of two variables using only two variables
Shell script to swap values of two variables using only two variables

3. To find the sum of n even numbers

Sample Code:

#! /bin/sh
#sum of even numbersE
read n
sum=0
for ((i=1;i<=n;i++))
        do
        if ((i%2==0))
                then
                        sum=$((sum+i))
                fi
        done
echo $sum

Sample Output:

Shell Script to find the sum of n even numbers
Shell Script to find the sum of n even numbers

4. To print the multiplication table of a given number

Sample Code:

#!bin/sh
	i=1;
	echo 'Enter the multiplier number'
	read n
	echo 'Enter the limit of the multiplication number'
	read limit
	echo "The multiplication table of $n":
	for ((i=1;i<=limit;i++))
		do
			pro=$((n*i))
			echo "$n * $i = $pro"
		done

Sample Output:

Shell Script To print the multiplication table of a given number
Shell Script To print the multiplication table of a given number

You may also like to read:

  1. Phone-book Using Shell Script

  2. Some Shell Scripts

  3. Basic Bash Shell Commands

  4. 15 Basic Unix Commands One Must Know

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