Golang for Loop – Let’s Learn

The Go Programming Language, also known as Golang, is a statically typed, compiled programming language that has gained immense popularity for it’s simplicity, efficiency, and built-in concurrency support. In this article we are going to explore about golang for loop and it’s various uses.

Golang for Loop Basics

The general & basic syntax of a Golang for loop is as follows –

for initialization; condition; update {
    // Code to be executed repeatedly
}

• Initialization: This part is executed only once at the start of loop and is typically used to initialize loop control variables.
• Condition: The loop continues executing as long as this condition is true. Once the condition becomes false, the loop exits.
• Update: This is usually an increment or decrement operation that modifies the loop control variable, moving towards the condition becoming false.

A simple for-loop example that prints numbers from 1 to 10 is as follows –

// Simple for loop to print numbers from 1 to 10
    for i := 1; i <= 10; i++ {
        fmt.Println(i)
    }

Golang for loop range

The Golang for loop range keyword allows us to iterate over the elements of a slice, array, map, or string. Here The range keyword returns two values: the index and the value. An example of golang for loop with range keyword is given bellow

package main

import "fmt"

func main() {
	numbers := []int{1, 3, 4, 5, 6, 7, 34, 65}

	for index, value := range numbers {
		fmt.Printf("Index: %d, Value: %d\n", index, value)
	}
}

Golang for Loop Array

Arrays are a fundamental data structure in Golang, and we can easily iterate Arrays with for loop in Golang and perform various operation with Arrays.

package main

import "fmt"

func main() {
    numbers := [5]int{2, 4, 6, 8, 10}
    sum := 0

    for _, value := range numbers {
        sum += value
    }

    fmt.Printf("Sum of elements: %d\n", sum)
}

See Also

• C Code for Factorial
• C Code for Prime Number
• C Program to Print Sum of Even and Odd Numbers