A little help needed.Can you print these series in a same loop(can use nested loop)

Question

(Program im c,cpp,python,php is appreciated(i know these only)

here is the series
0000
0001
0002
0003
0004
.
.
.
0010
.
.
.
.
0100
0101
0101
.
.
.

9000
.
.
.
.
9998
9999

I tried the for loop ( for i=0000;i<=9999;i++)
. but the number is only starting from 1 instead of 0001.
i know my code doesn't work like what i meant to be.
The thing is i need this series to print only using one loop only.( loop in a loop is ok. but dont use another loop is outside the first loop. i think you get it.)

Answer 1

https://www.tutorialspoint.com/JUMP_LINK__&&__python__&&__JUMP_LINK/string_zfill.htm

Syntax: str.zfill(width)

Example:
str.zfill(4)

^Ensures it's 4 in length, so if it's 1 it'll be 0001. etc... Use simple loop, nested not needed.

Answer 2

Try with that but not in SL Playground because its not finish for SL limits
https://code.sololearn.com/wS8V8aLfUyr8/?ref=app

Answer 3

heres a python solution

[print("0"*(4-len(str(i)))+str(i)) for i in range (1,200)]