What is the difference between je/jne and jz/jnz?

Question

Accepted Answer

They are the same instruction — je/jz are two names for one opcode (jump if ZF=1), and jne/jnz for another (jump if ZF=0).

Name
Alias
Meaning
Flag checked

je
jz
Jump if equal / zero
ZF = 1

jne
jnz
Jump if not equal / not zero
ZF = 0

Use je/jne after cmp (comparing two values). Use jz/jnz after test or arithmetic (checking if result is zero). The assembler doesn't care — it's purely a readability convention.
Go deeper:

Jcc reference (JE/JZ aliases) — shows JE and JZ share one opcode (74 short / 0F 84 near) and both test ZF, confirming they are aliases.

Name	Alias	Meaning	Flag checked
`je`	`jz`	Jump if equal / zero	ZF = 1
`jne`	`jnz`	Jump if not equal / not zero	ZF = 0