Calculate ceiling-of-4.5

Round numbers, floor, ceiling — step by step.

Number

Answer

-4

To find the ceiling of -4.5, follow the step-by-step solution below.

Step 1 — Apply the ceiling function

The ceiling function rounds up (toward positive infinity) to the smallest integer greater than or equal to the number.

-4.5 lies between -5 and -4. The smallest integer ≥ -4.5 is -4.

Note: for negative numbers, the ceiling goes toward zero.

⌈-4.5⌉ = -4

Ceiling-of-4.5: 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 ceiling-of-4.5?
The answer is -4.

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.