1-100偶数和

1-100偶数和

          let相当于var
            let sum2=0;
			for (let j =0; j <=100; j+=2) {
			  sum2+=j;
			}
			console.log(sum2);
			
			let sum3=0;
			for (let k =0; k <=100; k++) {
			  if(k%2==0){
				  sum3+=k;
			  }
			}
			console.log(sum3);