[macos] Terminal Commands: For loop with echo

I've never used commands in terminal like this before but I know its possible. How would I for instance write:

for (int i = 0; i <=1000; i++) {
    echo "http://example.com/%i.jpg",i
}

By using jot:

jot -w "http://example.com/%d.jpg" 1000 1

you can also use for loop to append or write data to a file. example:

for i in {1..10}; do echo "Hello Linux Terminal"; >> file.txt done

">>" is used to append.

">" is used to write.

jot would work too (in bash shell)

for i in `jot 1000 1`; do echo "http://example.com/$i.jpg"; done

Is you are in bash shell:

for i in {1..1000}
do
   echo "Welcome $i times"
done

for ((i=0; i<=1000; i++)); do
    echo "http://example.com/$i.jpg"
done