Part 31 supplement (31) ECMAScript conversion to string and number

1、 Convert to string

// Convert to string 

// If no cardinality is specified ,toString() All output in decimal system ;

2、 Convert to numbers

// Convert to numbers 

//parseInt(): Convert the value to an integer ;

//parseFloat(): Convert a value to a floating point number ;

// Both methods can only be used for String type , Return values of other types are NaN;

3、 Code

import QtQuick 2.9
import QtQuick.Window 2.2

Window {
    visible: true
    width: 640
    height: 480

    Component.onCompleted: {
        // Convert to string 
        // If no cardinality is specified ,toString() All output in decimal system ;
        var name = "fjf"
        console.log(name.toString())

        var age = 22
        console.log(age.toString(2))

        var isIf = false
        console.log(isIf.toString())

        // Convert to numbers 
        //parseInt(): Convert the value to an integer ;
        //parseFloat(): Convert a value to a floating point number ;
        // Both methods can only be used for String type , Return values of other types are NaN;

        var num1 = parseInt("3.1415")
        console.log(num1)

        var num2 = parseFloat("3.1415")
        console.log(num2)
    }
}