Golang For Loop: Mastering Iteration Methods with Examples

Understanding Golang For Loop and Iteration Methods

In Golang (Go programming language), a for loop is an essential control structure used for iterating and executing a block of code multiple times. This article will explore different methods of iteration in Go, with useful examples to help you master how for loops work.

Basic Golang For Loop Structure

The basic structure of a Golang for loop consists of three components: initialization, condition, and post statement. The loop starts with the initialization, continues executing the block of code as long as the condition is true, and performs the post statement after each iteration.

for i := 0; i < 10; i++ {
    // code block to be executed
}

Golang For Loop as a While Loop

In Go, you can use a for loop to mimic the behavior of a while loop. To achieve this, you only need to specify the loop's condition, omitting the initialization and post statement.

i := 0
for i < 10 {
    // code block to be executed
    i++
}

Infinite Golang For Loop

An infinite for loop in Golang is a loop that continues to execute indefinitely without stopping. To create an infinite loop, you simply use the 'for' keyword followed by a block of code with no condition.

for {
    // code block to be executed
}

Golang For Loop with Range

Using the range keyword in a Golang for loop allows you to iterate over elements in a data structure, such as arrays, slices, or maps. The range returns the index and value for each element, making it easier to process the data.

numbers := []int{1, 2, 3, 4, 5}
for index, value := range numbers {
    // code block to be executed
}

Golang For Loop with Break and Continue

In Golang, you can use the break and continue statements within a for loop for better control. 'Break' is used to exit the loop prematurely, while 'continue' skips the current iteration and moves on to the next one.

for i := 0; i < 10; i++ {
    if i == 5 {
        break
    }
    if i%2 == 0 {
        continue
    }
    // code block to be executed
}