Introduction to C#

faq.txt

Q1) How to assigned a number as a decimal in c#?
ans: To assigned a number as decimal we need to use the 'm' with the number.ie decimal dec = 1.2m; 
     For double we need to use 'd' with the number e.g double d = 1.2d;

Q2) What is the difference between double and decimal ?
ans: double is 64-bit floating-point number whereas Decimal is a 128-bit floating-point number and have higher precision.
     eg. Console.WriteLine(1m/3);  //in decimal
         Console.WriteLine(1d/3);  // in double
         
         0.3333333333333333333333333333  //decimal
         0.333333333333333              //double
         
Q3) Differnce between var and dynamic type ?
ans: var is defined at compile time and once a data type is assigned ,it can't be change.Whereas decimal is defined at runtime and the
     data type can be changed even after the declaration.

Q4) How to take integer as input from the user ?
ans: We should change the input taken in string to integer using int.Parse() function.
     eg. int a=int.Parse(Console.ReadLine());
     

Mcq.txt

Q1. How to take a input in c# :
a) Console.writline()
b) Console.Readline()
c) Console.Readall()
d) Console.ReadLine()

ans: d) Console.ReadLine()

Q2) Which of the following are not datatypes of c# :
a) int
b) bool
c) numbers
d) decimal

ans: c) numbers

Q3) How can we find the max range of a datatype ?
a) maxRange()
b) Max()
c) MaxValue()
d) Maxvalue()

ans: c) MaxValue()

Q4) what will be the output of this statement :
    
    var pep="hello pepcoder"
    pep=2010
    
    Console.WriteLine(pep);

a) hello pepcoder
b) 2010
c) error
d) none of the above

ans: c)error