File.printf

Write formatted data to file.

    
    
    
printf(format)

    
    
    
printf(format, arg1, arg2, ...argN)

Examples

Write formatted trading data.

    javascript
    
    
function main() {
    let file = os.open("trade_log.txt", "w+")
    let price = 100.25
    let volume = 1000
    let bytes = file.printf("Price: %.2f, Volume: %d\n", price, volume)
    Log("Formatted bytes written:", bytes)

    file.seek(0, 0)
    let data = file.read()
    Log("data:", data)
    // Output: data: Price: 100.25, Volume: 1000

    // file.printf("| Price: %.2f, Volume: %d\n")   // "| Price: %!f(MISSING), Volume: %!d(MISSING)"
    // file.seek(0, 0)
    // data = file.read()
    // Log("data:", data)

    file.close()
}

Returns

Arguments

See Also

Remarks

Supported verbs: %s, %d, %f, %v and %%, with flags (-, 0), width and precision, e.g. %.2f, %-8s, %08d. A missing argument is written as placeholder text such as %!d(MISSING).