Go Loops
Repeating code execution efficiently
🔄 What are Go Loops?
Go loops allow you to execute code repeatedly until a condition is met. Go has only one loop keyword 'for' but it can be used in multiple ways to create different loop patterns.
// Simple loop example
for i := 1; i <= 3; i++ {
fmt.Printf("Count: %d\n", i)
}
Output:
Count: 1
Count: 2
Count: 3
Types of For Loops
Classic For
Traditional three-part loop structure
for i := 0; i < 5; i++ {
fmt.Println(i)
}While-style
Loop with only condition
i := 0
for i < 5 {
fmt.Println(i)
i++
}Infinite Loop
Loop that runs forever
for {
fmt.Println("Forever")
break // Exit condition
}Range Loop
Iterate over collections
nums := []int{1, 2, 3}
for i, v := range nums {
fmt.Println(i, v)
}🔹 Classic For Loop
The traditional three-part for loop:
package main
import "fmt"
func main() {
// Print numbers 1 to 5
for i := 1; i <= 5; i++ {
fmt.Printf("Number: %d\n", i)
}
fmt.Println("Loop finished!")
}Output:
Number: 1
Number: 2
Number: 3
Number: 4
Number: 5
Loop finished!
🔹 While-style Loop
Loop with only a condition (like while in other languages):
package main
import "fmt"
func main() {
count := 0
for count < 3 {
fmt.Printf("Count is: %d\n", count)
count++
}
fmt.Println("Done counting!")
}Output:
Count is: 0
Count is: 1
Count is: 2
Done counting!
🔹 Infinite Loop with Break
Loop forever until a break condition is met:
package main
import "fmt"
func main() {
counter := 0
for {
fmt.Printf("Iteration: %d\n", counter)
counter++
if counter >= 3 {
fmt.Println("Breaking out of loop!")
break
}
}
fmt.Println("After loop")
}Output:
Iteration: 0
Iteration: 1
Iteration: 2
Breaking out of loop!
After loop
🔹 Continue Statement
Skip the current iteration and continue with the next:
package main
import "fmt"
func main() {
for i := 1; i <= 5; i++ {
if i == 3 {
fmt.Println("Skipping 3")
continue
}
fmt.Printf("Processing: %d\n", i)
}
}Output:
Processing: 1
Processing: 2
Skipping 3
Processing: 4
Processing: 5
🔹 Nested Loops
Loops inside other loops for complex iterations:
package main
import "fmt"
func main() {
fmt.Println("Multiplication Table:")
for i := 1; i <= 3; i++ {
for j := 1; j <= 3; j++ {
result := i * j
fmt.Printf("%d x %d = %d ", i, j, result)
}
fmt.Println() // New line after each row
}
}Output:
Multiplication Table:
1 x 1 = 1 1 x 2 = 2 1 x 3 = 3
2 x 1 = 2 2 x 2 = 4 2 x 3 = 6
3 x 1 = 3 3 x 2 = 6 3 x 3 = 9