Logical operators in Go - Step-by-Step Execution

Concept Flow - Logical operators

Start

↓

Evaluate Left Operand

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Evaluate Right Operand

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Apply Logical Operator

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Result: true or false

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End

Logical operators combine two true/false values and produce a true or false result.

Execution Sample

Go

package main
import "fmt"
func main() {
  a := true
  b := false
  fmt.Println(a && b)
  fmt.Println(a || b)
  fmt.Println(!a)
}

This code shows how AND, OR, and NOT logical operators work with true and false values.

Execution Table

Step	Expression	Left Operand	Right Operand	Operator	Result
1	a && b	true	false	AND (&&)	false
2	a || b	true	false	OR (||)	true
3	!a	true	N/A	NOT (!)	false

💡 All logical operations evaluated, program ends.

Variable Tracker

Variable	Initial	After Step 1	After Step 2	After Step 3
a	true	true	true	true
b	false	false	false	false
result	N/A	false	true	false

Key Moments - 2 Insights

Why does 'a && b' result in false even though 'a' is true?

Because AND (&&) needs both operands to be true. Here, 'b' is false, so the whole expression is false (see execution_table row 1).

What does the NOT operator (!) do to 'a'?

NOT (!) flips the value. Since 'a' is true, '!a' becomes false (see execution_table row 3).

Visual Quiz - 3 Questions

Look at the execution table, what is the result of 'a || b' at step 2?

A undefined

B false

C true

D error

💡 Hint

Check execution_table row 2 under Result column.

At which step does the NOT operator (!) get applied?

A Step 3

B Step 2

C Step 1

D No NOT operator used

💡 Hint

Look at the Operator column in execution_table for '!'.

If 'b' was true, what would be the result of 'a && b' at step 1?

A false

B true

C false and true

D error

💡 Hint

AND needs both true to be true; see execution_table row 1 and variable_tracker for 'b'.

Concept Snapshot

Logical operators combine true/false values:
- AND (&&): true if both true
- OR (||): true if one true
- NOT (!): flips true/false
Used to make decisions in code.

Full Transcript

This example shows how logical operators work in Go. We start with two variables: a is true, b is false. The AND operator (&&) checks if both are true; since b is false, the result is false. The OR operator (||) checks if at least one is true; since a is true, the result is true. The NOT operator (!) flips the value of a from true to false. These operators help combine conditions in programming.