[Swift5] How to round off, round down, and round up to the second or third decimal place

let num = 7.5
 
let numRound = round(num)   
//8 (rounded)

let numFloor = floor(num)   
//7 truncated)

let numCeil  = ceil(num)    
//8 (rounded up)

let num = 3.1415
 
let numRound = round(num*10)/10   
// 3.1 (rounded to the first decimal place)

let numFloor = floor(num*100)/100   
// 3.14 (rounded down to the first decimal place)

let numCeil =ceil(num*1000)/1000   
// 3.142 (rounded up to 4 decimal places)

Recommended Posts