var？ sum？ =? 0; ? //Define a sum variable with an initial value of 0 as an accumulator.

for(var？ Me? =? 2; Me? & lt=? 100; i+=2){？

/*

Define a variable I to store the current even number; When I is less than or equal to 100, execute the following accumulation statement.

; After the accumulation statement is executed, the I variable will be increased by 2, and judgment-accumulation will continue.

*/

sum？ +=? Me; ? //Add the value of I to the sum.

}

Console.log(sum)// Finally, output the summation result on the console, 2550.

& lt script & gt