Sum of N Numbers in Shell Script

In this shell script, we will learn to write:

• sum of n numbers in shell script

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SUM OF N NUMBERS ALGORITHM:

Given below is algorithm for shell script to find sum of n numbers:

STEP 1: START THE PROGRAM

STEP 2: TAKE INPUT A NUMBER ( >=1). AND STORE IT IN A VARIABLE ( SUPPOSE ‘DIGIT’)

STEP 3: DECLARE A VARIABLE AND INITIALIZE IT WITH 1 ( suppose ‘temp’)

STEP 4: DECLARE ANOTHER VARIABLE (LET’S SAY ‘TOTAL’ WHICH SHOULD BE INITIALIZED WITH ZERO ) WHICH WILL HELP US TO ADD UP TO DIGIT

STEP 5: PERFORM WHILE LOOP FROM 1 TO ‘DIGIT’

STEP 6: WRITE THIS LINE INSIDE THE WHILE LOOP -> total=`expr $ total + $temp`

STEP 7: WHILE PERFORMING LOOP, EVERYTIME INCREASE ‘DIGIT=$DIGIT+1’

STEP 8: AT LAST PRINT ‘TOTAL’

STEP 9: STOP THE PROGRAM

 

SUM OF N NUMBERS IN SHELL SCRIPT

To find sum of n natural numbers in shell script is shown below:

clear
echo "---------SUM OF N NUMBERS IN SHELL SCRIPT-----------"
echo -n "Enter nth number's value:"
read digit
t=1
total=0
while test $t -le $digit
do
        total=`expr $total + $t`
        t=`expr $t + 1`
done
echo "SUM OF $DIGIT: $total "

OUTPUT

Enter nth number's value: 5

SUM OF : 15

 

CODE IMAGE:

Write a shell script to calculate sum of n numbers in shell script:

OUTPUT IMAGE: