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constPI=Math.PI;letr=Number.parseFloat(readLine()).toFixed(3);functioncheck(){if(r>0&&r<=100&&r!==NaN){returntrue;}else{returnfalse;}}if(check()===true){// Print the area of the circle:console.log(PI*(r**2));// Print the perimeter of the circle:console.log(2*PI*r);}
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Day 1: Let and Const
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Solution