When value is assigned to components state, why console.log prints the previous state?

Question

I\'m sending values of numbers from Numbers component to Main component. Everything is working fine until I set that value in my Main component to that component\'s state.<

Answer 1

In order to print state number in console use

this.setState({
        number: num
    },function(){console.log("but wrong here (previous number): " + this.state.number)})

instead of

this.setState({
        number: num
    })
    console.log("but wrong here (previous number): " + this.state.number)

In short: use setState(function|object nextState[, function callback])