What does this Assembly snippet output?

1.global _main
2.align 2
3_main:
4    stp x29, x30, [sp, #-16]!
5    mov w19, #1
6    mov w20, #10
71:
8    cmp w19, w20
9    bge 2f
10    add w19, w19, w19
11    b 1b
122:
13    sub sp, sp, #16
14    str x19, [sp]
15    adrp x0, fmt@PAGE
16    add x0, x0, fmt@PAGEOFF
17    bl _printf
18    add sp, sp, #16
19    ldp x29, x30, [sp], #16
20    mov w0, #0
21    ret
22.section __TEXT,__cstring
23fmt: .asciz "%d\n"