#!/bin/bash

for i in {1..$1}
do
    echo $i
done

1
2

for ((i = 1; i <= $1; i++)); do
    echo $i
done

# Not recommended with large sequences.
for i in $(seq 1 $1); do
    echo $i
done

#cycle through all args
for (( i=1; i<=$#; i++ )); do
    eval arg=$$i
    echo "$arg"
done

#cycle through all args
for (( i=1; i<=$#; i++ )); do
    echo "${!i}"
done

seq $1

x=10; for i in $(eval echo {1..$x}); do echo $i; done

set -- 10
for i in $(eval echo {1..$1})
do
    echo $i
done

set -- 1000
eval echo {1..$1} |
while read i
do
    echo $i
done

set -- 1000
while read i
do
     echo $i
done <(eval echo {1..$1})