Storage get value

@Cankaya wrote:

Hi,
it's OK.

		this.storage.get('buttonBool').then((data)=>{this.flag=data;});
		this.storage.get('buttonBool').then((data)=>{console.log(this.flag);});

But

		this.storage.get('buttonBool').then((data)=>{this.flag=data;});
		console.log(this.flag);

why undefined value?
How do I use it?

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