rounding up to the nearest hundred js

1Math.round(X);           // round X to an integer
2Math.round(10*X)/10;     // round X to tenths
3Math.round(100*X)/100;   // round X to hundredths
4Math.round(1000*X)/1000; // round X to thousandths

1Math.round(n / 100) * 100

1Math.round(X);           // round X to an integer
2Math.round(10*X)/10;     // round X to tenths
3Math.round(100*X)/100;   // round X to hundredths
4Math.round(1000*X)/1000; // round X to thousandths
5...
6

1function round100 (num1) {
2    return Math.round(num1/100)*100;
3}