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The && (logical AND) operator is a binary operator in Go that evaluates two boolean expressions and returns true if and only if both operands evaluate to true. If either or both operands are false, the expression yields false. 
expression1 && expression2

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Technical Characteristics

Strict Typing Both operands must be of the bool type or evaluate to a boolean value. Unlike some dynamically typed languages, Go does not perform implicit type coercion (truthiness/falsiness). Attempting to use non-boolean types, such as integers or pointers, with the && operator will result in a compile-time type mismatch error. Short-Circuit Evaluation Go evaluates the && operator from left to right using short-circuit logic.
  1. expression1 is evaluated first.
  2. If expression1 evaluates to false, the overall result is guaranteed to be false. Go immediately terminates the evaluation of the statement.
  3. expression2 is evaluated only if expression1 evaluates to true.
This mechanism guarantees that any potential runtime panics (such as nil pointer dereferences or out-of-bounds array accesses) or function side-effects present in the right-hand operand will not occur if the left-hand operand evaluates to false. Operator Precedence The && operator has a specific position in Go’s operator precedence hierarchy:
  • It evaluates after comparison operators (==, !=, <, <=, >, >=).
  • It evaluates before the logical OR operator (||).
Because of this precedence, an expression like a == b && c != d is implicitly evaluated as (a == b) && (c != d) without requiring explicit grouping parentheses.

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Truth Table and Evaluation Flow

expression1expression2ResultEvaluation Behavior
truetruetrueBoth expressions are evaluated.
truefalsefalseBoth expressions are evaluated.
falsetruefalseexpression2 is not evaluated.
falsefalsefalseexpression2 is not evaluated.
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