C # syntax exercise (4): type conversion

Use the convert class:

 
Toboolean-> bytes-> bytetochar-> chartodatetime-> bytes-> decimaltodouble-> doubletoint16-> optional toint32-> inttoint64-> bytes-> floattostring-> stringtouint16-> ushorttouint32 -> uinttouint64-> ulong
 

 
Using system; Class myclass {static void main () {int num; string STR; num = 99; STR = convert. tostring (Num); console. writeline (STR); STR = "123"; num = convert. toint32 (STR); console. writeline (Num); console. readkey ();}}

  
 

Implicit conversion:

Using system; Class myclass {static void main () {byte n = byte. maxvalue; short n1 = N; int n2 = N; long N3 = N; console. writeline ("{0}, {1}, {2}", N1, N2, N3); // 255,255,255 console. readkey ();}}

  
 

Display conversion, data may be lost due to overflow:

 
Using system; Class myclass {static void main () {ulong n = ulong. maxvalue; Byte N1 = (byte) N; ushort n2 = (ushort) N; uint N3 = (uint) N; console. writeline ("{0}, {1}, {2}", N1, N2, N3); // 4294967295, console. readkey ();}}

  
 

Overflow check:

Using system; Class myclass {static void main () {int I; byte B; I = 255; B = (byte) I;/* I is within the byte range, no overflow */B = unchecked (byte) I);/* same line, no overflow check */console. writeline (B); // 255 I ++; B = (byte) I;/* I is out of the byte range and will overflow */B = unchecked (byte) i);/* the same line as the previous line without any overflow check */console. writeline (B); // 0 I = 255; B = checked (byte) I);/* overflow detection */console. writeline (B); // 255 I ++; B = checked (byte) I);/* overflow detection fails and an error is reported */console. writeline (B); console. readkey ();}}