package main
import (
"fmt"
"strings"
)
/*
This program wraps a string into lines of maximum width w.
Method:
- Split the input text into words using strings.Fields().
- Build each line until adding another word would exceed the width.
- When the limit is reached, store the line and begin a new one.
- Uses slices and string operations for clear and efficient processing.
*/
func wrapText(text string, w int) string {
words := strings.Fields(text) // Split on whitespace
line := ""
var result []string
for _, word := range words {
// If line is empty, start it with the word
if len(line) == 0 {
line = word
} else {
// Check if adding the next word exceeds width
if len(line)+1+len(word) <= w {
line += " " + word
} else {
// Store the completed line
result = append(result, line)
line = word
}
}
}
// Add the final line
if len(line) > 0 {
result = append(result, line)
}
return strings.Join(result, "\n")
}
func main() {
sample :=
"Go provides useful built-in tools for handling strings. " +
"This program demonstrates how to wrap text cleanly and efficiently."
wrapped := wrapText(sample, 35)
fmt.Println(wrapped)
}
/*
run:
Go provides useful built-in tools
for handling strings. This program
demonstrates how to wrap text
cleanly and efficiently.
*/
