---
id: c-operators-assignment
title: "C Assignment Operators"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["+= -= *=", "compound assignment", "C 대입 연산자"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.84
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["c", "programming-language", "w3schools", "operators", "assignment"]
raw_sources: ["https://www.w3schools.com/c/c_operators_assignment.php"]
applied_in: []
github_commit: ""
---

# [[C Assignment Operators]]

## 🎯 한 줄 통찰 (One-line insight)
Every compound assignment operator — including the bitwise ones (`&=`, `|=`, `^=`, `>>=`, `<<=`) covered later in the Bitwise chapter — follows the identical expansion pattern `x OP= y` ≡ `x = x OP y`, meaning learning this ONE rule (rather than memorizing 11 separate operators) is enough to understand every assignment shorthand in the language, arithmetic or bitwise alike. [S1]

## 🧠 핵심 개념 (Core concepts)
- **`=`** — basic assignment. [S1]
- **Arithmetic compound operators** — `+=`, `-=`, `*=`, `/=`, `%=`, each expanding to `x = x <op> value`. [S1]
- **Bitwise compound operators** — `&=`, `|=`, `^=`, `>>=`, `<<=`, following the SAME expansion pattern as the arithmetic ones. [S1]
- **Purpose** — pure shorthand for readability/brevity; functionally identical to the fully-spelled-out form. [S1]

## 📖 세부 내용 (Details)
- Full expansion table: `x += 3` ≡ `x = x + 3`; `x -= 3` ≡ `x = x - 3`; `x *= 3` ≡ `x = x * 3`; `x /= 3` ≡ `x = x / 3`; `x %= 3` ≡ `x = x % 3`; `x &= 3` ≡ `x = x & 3`; `x |= 3` ≡ `x = x | 3`; `x ^= 3` ≡ `x = x ^ 3`; `x >>= 3` ≡ `x = x >> 3`; `x <<= 3` ≡ `x = x << 3`. [S1]
- Real-life savings tracker: `int savings = 100; savings += 50; // add 50 to savings printf("Total savings: %d\n", savings);`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).

## 🛠️ 적용 사례 (Applied in summary)
저축액에 50을 더하는 savings += 50 예제가 원문에서 직접 실전 활용 사례로 제시됨(계좌 잔액 누적 갱신). [S1]

## 💻 코드 패턴 (Code patterns)
Tracking a running total using the compound addition-assignment operator (C):
```c
int savings = 100;
savings += 50; // add 50 to savings
printf("Total savings: %d\n", savings);
```

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
- **신뢰 점수:** 0.84
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[C Tutorial]]
- **관련 개념:** [[C Operators Arithmetic]], [[C Operators Comparison]], [[C Bitwise Operators]]
- **참조 맥락:** 대입 연산자 — 비교 연산자(Operators Comparison) 챕터로 이어짐, 비트 대입 연산자는 Bitwise Operators 챕터와 연결.

## 📚 출처 (Sources)
- [S1] W3Schools — C Assignment Operators — https://www.w3schools.com/c/c_operators_assignment.php

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "C Assignment Operators" page (Astra wiki-curation, P-Reinforce v3.1 format).