#!/bin/bash

massiv[0]="zero"
massiv[1]="one"
massiv[2]="two"

for i in {0..2}; do
  echo "${massiv[$i]}"
done

world[0]=15
world[1]=5

world[2]=$((world[0] + world[1]))
echo "${world[2]}"

count=${#massiv[@]}
echo "$count"