CODEWITHSUNDEEP
iosobjective-cabsolute-value
user6438311
user6438311

Reputation: 137

How to convert this value into absolute value?

I am getting this from webservice "rateavg": "2.6111"

now i am getting this in a string. How to do this that if it is coming 2.6 it will show 3 and if it will come 2.4 or 2.5 it will show 2 ?

How to get this i am not getting. please help me

Upvotes: 0

Views: 255

Answers (9)

CHwang
CHwang

Reputation: 163

NSString* str = @"2.61111111";
double value = [str doubleValue];

2.5 -> 3: int num = value+0.5;
2.6 -> 3: int num = value+0.4;

Set as your need:

double factor = 0.4
if (value < 0) value *= -1;
int num = value+factor;

NSLog(@"%d",num);

Upvotes: 0

Saranjith
Saranjith

Reputation: 11587

You can round off decimal values by using NSNumberFormatter There are some examples you can go through:

    NSNumberFormatter *format = [[NSNumberFormatter alloc] init];
    [format setPositiveFormat:@"0.##"];
    NSLog(@"%@", [format stringFromNumber:[NSNumber numberWithFloat:25.342]]);
    NSLog(@"%@", [format stringFromNumber:[NSNumber numberWithFloat:25.3]]);
    NSLog(@"%@", [format stringFromNumber:[NSNumber numberWithFloat:25.0]]);

Corresponding results:

2010-08-22 15:04:10.614 a.out[6954:903] 25.34
2010-08-22 15:04:10.616 a.out[6954:903] 25.3
2010-08-22 15:04:10.617 a.out[6954:903] 25

Upvotes: 0

Ketan Parmar
Ketan Parmar

Reputation: 27448

Try below code I have tested it and work for every digits,

 NSString *str = @"2.7";

NSArray *arr = [str componentsSeparatedByString:@"."];


NSString *firstDigit = [arr objectAtIndex:0];
NSString *secondDigit = [arr objectAtIndex:1];

if (secondDigit.length > 1) {

    secondDigit = [secondDigit substringFromIndex:1];
}

int secondDigitIntValue = [secondDigit intValue];
int firstDigitIntValue = [firstDigit intValue];

if (secondDigitIntValue > 5) {

    firstDigitIntValue = firstDigitIntValue + 1;
}

NSLog(@"final result : %d",firstDigitIntValue);

Or another solution - little bit short 

 NSString *str1 = @"2.444";

float my = [str1 floatValue];

NSString *resultString = [NSString stringWithFormat:@"%.f",my];  // if want result in string

NSLog(@"%@",resultString);

int resultInInt = [resultString intValue]; //if want result in integer

Upvotes: 1

Muruganandam Sathasivam
Muruganandam Sathasivam

Reputation: 479

    NSString *value = @"1.23456";
    float floatvalue = value.floatValue;
    int rounded = roundf(floatvalue);
    NSLog(@"%d",rounded);

if you what the round with greater value please use ceil(floatvalue)

if you what the round with lesser value please use floor(floatvalue)

Upvotes: 0

Ronak Chaniyara
Ronak Chaniyara

Reputation: 5436

To round value to the nearest integer use roundf() function of math.

import math.h first:

#import "math.h"

Example,

float ValueToRoundPositive;

ValueToRoundPositive = 8.4;

int RoundedValue = (int)roundf(ValueToRoundPositive); //Output: 8

NSLog(@"roundf(%f) = %d", ValueToRoundPositive, RoundedValue);


float ValueToRoundNegative;

ValueToRoundNegative = -6.49;

int RoundedValueNegative = (int)roundf(ValueToRoundNegative); //Output: -6

NSLog(@"roundf(%f) = %d", ValueToRoundNegative, RoundedValueNegative);

Read doc here for more information:

http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/roundf.3.html

Upvotes: 0

balkaran singh
balkaran singh

Reputation: 2786

plz use this

lblHours.text =[NSString stringWithFormat:@"%.02f",  [yourstrvalue doubleValue]];

update 

   NSString *a =@"2.67899";
   NSString *b    =[NSString stringWithFormat:@"%.01f",  [a doubleValue]];
    // b will contane only one vlue after decimal
    NSArray *array = [b componentsSeparatedByString:@"."];

    int yourRating;
    if ([[array lastObject] integerValue] > 5) {

        yourRating = [[array firstObject] intValue]+1;

    }
    else
    {
        yourRating = [[array firstObject] intValue];
    }
    NSLog(@"%d",yourRating);

Upvotes: 1

Bista
Bista

Reputation: 7903

I come up with this, a replica of your query:

NSString* str = @"2.611";
double duble = [str floatValue];

NSInteger final = 0;


if (duble > 2.5) {
    final = ceil(duble);
}else{
    final = floor(duble);
}

NSLog(@"%ld",(long)final);

So it a case of using either ceil or floor methods.

Edit: Since you want it for all doubles:

NSString* str = @"4.6";
double duble = [str floatValue];

NSInteger final = 0;

NSInteger temp = floor(duble);
double remainder = duble - temp;

if (remainder > 0.5) {
    final = ceil(duble);
}else{
    final = floor(duble);
}

NSLog(@"%ld",(long)final);

Upvotes: 1

Sangram Shivankar
Sangram Shivankar

Reputation: 3573

check this

float floatVal = 2.6111;
long roundedVal = lroundf(floatVal);
NSLog(@"%ld",roundedVal);

Upvotes: 1

Kamlesh Shingarakhiya
Kamlesh Shingarakhiya

Reputation: 2777

Try This

float f=2.6;
NSLog(@"%.f",f);

Hope this helps.

Upvotes: 2

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