Testing Big against Number

• toExponential [ decimal places ]
• toFixed [ decimal places ]
• toPrecision [ significant digits ]
• round [ decimal places [ , rounding mode ] ]
• sqrt

• Round down Round towards zero. I.e. truncate, no rounding
• Round half up Round towards nearest neighbour. If equidistant, round up
• Round half even Round towards nearest neighbour. If equidistant, round towards even neighbour
• Round up Round away from zero.