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Q&A What is the meaning of "short circuit" operators?

When reading about various operators used by programming languages, the term "short circuit behavior" is often used. For example in this C code: int a = 0; a && b++ Someone explained t...

2 answers  ·  posted 1y ago by Lundin‭  ·  last activity 1y ago by matthewsnyder‭

#3: Post edited by user avatar Lundin‭ · 2023-09-28T08:23:12Z (about 1 year ago)
  • When reading about various operators used by programming languages, the term "short circuit behavior" is often used. For example in this C code:
  • int a = 1;
  • a && b++
  • Someone explained that `b++` is never executed because the logical AND operator "short circuits". What do they even mean with this?
  • Assuming I'm a layman at electronics (but not necessarily at programming), the association I get when hearing "short circuit" is something like connecting + directly to - on a battery, resulting in a spectacular failure such as cables burning up. And that doesn't seem like something I would want to happen to my program...
  • Why is it called "short circuit behavior"? What's the analogy and how is it helpful in understanding how certain operators work?
  • When reading about various operators used by programming languages, the term "short circuit behavior" is often used. For example in this C code:
  • int a = 0;
  • a && b++
  • Someone explained that `b++` is never executed because the logical AND operator "short circuits". What do they even mean with this?
  • Assuming I'm a layman at electronics (but not necessarily at programming), the association I get when hearing "short circuit" is something like connecting + directly to - on a battery, resulting in a spectacular failure such as cables burning up. And that doesn't seem like something I would want to happen to my program...
  • Why is it called "short circuit behavior"? What's the analogy and how is it helpful in understanding how certain operators work?
#2: Post edited by user avatar Lundin‭ · 2023-09-28T08:15:28Z (about 1 year ago)
  • When reading about various operators used by programming languages, the term "short circuit behavior" is often used. For example in this C code:
  • a && b++
  • Someone explained that `b++` is never executed because the logical AND operator "short circuits". What do they even mean with this?
  • Assuming I'm a layman at electronics (but not necessarily at programming), the association I get when hearing "short circuit" is something like connecting + directly to - on a battery, resulting in a spectacular failure such as cables burning up. And that doesn't seem like something I would want to happen to my program...
  • Why is it called "short circuit behavior"? What's the analogy and how is it helpful in understanding how certain operators work?
  • When reading about various operators used by programming languages, the term "short circuit behavior" is often used. For example in this C code:
  • int a = 1;
  • a && b++
  • Someone explained that `b++` is never executed because the logical AND operator "short circuits". What do they even mean with this?
  • Assuming I'm a layman at electronics (but not necessarily at programming), the association I get when hearing "short circuit" is something like connecting + directly to - on a battery, resulting in a spectacular failure such as cables burning up. And that doesn't seem like something I would want to happen to my program...
  • Why is it called "short circuit behavior"? What's the analogy and how is it helpful in understanding how certain operators work?
#1: Initial revision by user avatar Lundin‭ · 2023-09-28T08:06:41Z (about 1 year ago)
What is the meaning of "short circuit" operators?
When reading about various operators used by programming languages, the term "short circuit behavior" is often used. For example in this C code:

    a && b++

Someone explained that `b++` is never executed because the logical AND operator "short circuits". What do they even mean with this?

Assuming I'm a layman at electronics (but not necessarily at programming), the association I get when hearing "short circuit" is something like connecting + directly to - on a battery, resulting in a spectacular failure such as cables burning up. And that doesn't seem like something I would want to happen to my program...

Why is it called "short circuit behavior"? What's the analogy and how is it helpful in understanding how certain operators work?