Bash Simple for loop 2

Write a script:
Enter one of the three parameter 0,1,2,3
Input 3; Calculates the number of positive integers within 100 that can be divisible by 3;
Enter 2; calculate all the numbers of all even numbers within 100;
Enter 1; calculate all the odd numbers within 100 and all;
Input 0; Calculates the and of all integers within 100;

Code

#!/bin/bash#declare -i sum=0if [ $1 == 3 ];then  for i  IN {1..100};d o    if [ $[$I%3] -eq 0 ];then       sum=$[$SUM + $I]    fi  done  echo  $SUMelif  [ $1 == 2 ];THEN  FOR I IN {1..100};d o     if [ $[$I%2] -eq 0 ];then      sum=$[$SUM + $I]     fi  done  echo  $SUMelif  [ $1 == 1 ]; THEN  FOR I IN {1..100};d o    if [ $[$I%2-1] -eq  0 ];then      sum=$[$SUM + $I]    fi   done  echo  $SUMelif  [ $1 == 0 ];then  for i in  {1..100};d O  &Nbsp; sum=$[$SUM + $I]  done  echo  $SUMelse   echo  "usage: ./ for1003.sh arg [0,1,2,3] "fi

Execution results

[[email protected] ~]#/for1003.sh 0 5050[[email protected] ~]#./for1003.sh 12500[[email protected] ~]#./for1003 . SH 22550[[email protected] ~]#./for1003.sh 31683[[email protected] ~]#./for1003.sh 4Usage:./for1003.sh ARG [0,1,2,3]

Bash Simple for loop 2