Calculate floor-of--2.1

Round numbers, floor, ceiling — step by step.

Number

Answer

-3

To find the floor of -2.1, follow the step-by-step solution below.

Step 1 — Apply the floor function

The floor function rounds down (toward negative infinity) to the largest integer less than or equal to the number.

-2.1 lies between -3 and -2. The largest integer ≤ -2.1 is -3.

Note: for negative numbers, the floor goes further from zero, not toward zero.

⌊-2.1⌋ = -3

Floor-of--2.1: look at the digit after the rounding position to decide whether to round up or down.

This is a Rounding — rounding operation

What is the answer to floor-of--2.1?
The answer is -3.

What method is used?
Round up if the next digit is 5 or more, round down if less than 5. Floor always rounds down, ceiling always rounds up.