RLA - Z80 instruction reference

rlaRotate A left through carry 
Rotates A left one bit, moving C into bit 0 and bit 7 into C.
1 byte · 4 cycles
Used in Multiply and divide, with the remainderZ80 assembly
Print a number in any base without helpZ80 assembly
 
SZHP/VNC ––0–0●
● set from the result
0 always 0
– not changed
Forms  rla  
The contents of A are rotated left one bit position. The contents of bit 7 are copied to the carry flag and the previous contents of the carry flag are copied to bit 0.
         .org 0x8000
        ld a, 5
        rla
        halt