Table of Contents

## What is NSNumber?

NSNumber is a subclass of NSValue that offers a value as any C scalar (numeric) type. It defines a set of methods specifically for setting and accessing the value as a signed or unsigned char , short int , int , long int , long long int , float , or double or as a BOOL .

**Can you use decimals for INT?**

Key idea: Like whole numbers, integers don’t include fractions or decimals.

**What is NSDecimalNumber?**

The NSDecimalNumber Class is a subclass of the NSNumber class and has methods for performing arithmetic operations without loss of precision and with predictable rounding behavior. This makes it a better choice for representing currency than C’s floating-point data type like double.

### Why use NSNumber?

The purpose of NSNumber is simply to box primitive types in objects (pointer types), so you can use them in situations that require pointer-type values to work. One common example: you have to use NSNumber if you want to persist numeric values in Core Data entities.

**What is NSData in iOS?**

A static byte buffer that bridges to Data ; use NSData when you need reference semantics or other Foundation-specific behavior. iPadOS 2.0+ macOS 10.0+

**What is NSTimeInterval?**

A NSTimeInterval value is always specified in seconds; it yields sub-millisecond precision over a range of 10,000 years. On its own, a time interval does not specify a unique point in time, or even a span between specific times.

#### Is 0.5 an integer number?

Answer: The whole numbers are set of real numbers that includes zero and all positive counting numbers. Whereas, excludes fractions, negative integers, fractions, and decimals. Since, 0.5 being the decimal number, it is not considered to be a whole number.

**How do I convert decimal to int in Salesforce?**

Integer myintval = Integer. valueOf(mydecval); So, we should always use decimalvariable. intValue() to convert decimal value into integer.

**What is NSMutableData in Swift?**

NSData and its mutable subclass NSMutableData provide data objects, object-oriented wrappers for byte buffers. Data objects let simple allocated buffers (that is, data with no embedded pointers) take on the behavior of Foundation objects.

## What is Nsobject in Swift?

The root class of most Objective-C class hierarchies, from which subclasses inherit a basic interface to the runtime system and the ability to behave as Objective-C objects.

**What is TimeInterval in Swift?**

Discussion. A TimeInterval value is always specified in seconds; it yields sub-millisecond precision over a range of 10,000 years. On its own, a time interval does not specify a unique point in time, or even a span between specific times.