Learning Swift from scratch (DAY4)--writing Swift with the playground tool

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with Playground Write Swift The purpose of the code is to learn, test algorithms, validate ideas, and visualize the results of the operation, not to make the final program compile and publish.

playground Program run ① area is code writing view, ② area is run result view, ③ area is timeline view, ④ area is console view, use print   650" this.width=650; "Width=" 25 " height= "title=" Image1.png "style=" width:25px;height:20px "src=" http://s2.51cto.com/wyfs02/M01/7B/67/ Wkiom1bnlbcwhbzjaaaea99-lre020.png "border=" 0 "vspace=" 0 "hspace=" 0 "alt=" wkiom1bnlbcwhbzjaaaea99-lre020.png "/>     button to hide and display the console.

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by default, the timeline view is not displayed, can be opened through the Assistant editor Playground time Axis view. In the toolbar that appears, click 650) this.width=650; "title=" Image3.png "src=" http://s5.51cto.com/wyfs02/M02/7B/67/ Wkiom1bnldtwqtcqaaaa5h5gb_y277.png "alt=" Wkiom1bnldtwqtcqaaaa5h5gb_y277.png "/> Open the assistant editor, There is a timeline view in the assistant editor.

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Learning Swift from scratch (DAY4)--writing Swift with the playground tool