C# Programming - Control Instructions - Discussion

First when it Enter into "forloop"

it prints "i" = "20"
it compares (i>-10) i.e (20>-10) is true
then it changes (i-=4) i.e 20-4=16 again stored in "i"

it prints "i" = "16"
it compares (i>-10) i.e (16>-10) is true
then it changes (i-=4) i.e 16-4=12 again stored in "i"

it prints "i" = "12"
it compares (i>-10) i.e (12>-10) is true
then it changes (i-=4) i.e 12-4=8 again stored in "i"

it prints "i" = "8"
it compares (i>-10) i.e (8>-10) is true
then it changes (i-=4) i.e 8-4=4 again stored in "i"

it prints "i" = "4"
it compares (i>-10) i.e (4>-10) is true
then it changes (i-=4) i.e 4-4=0 again stored in "i"

it prints "i" = "0"
it compares (i>-10) i.e (0>-10) is true
then it changes (i-=4) i.e 0-4=-4 again stored in "i"

it prints "i" = "-4"
it compares (i>-10) i.e (-4>-10) is true
then it changes (i-=4) i.e -4-4=-8 again stored in "i"

it prints "i" = "-8"
it compares (i>-10) i.e (-8>-10) is true
then it changes (i-=4) i.e -8-4=-12 again stored in "i"


it prints "i" = "-12"
it compares (i>-10) i.e (-12>-10) is False

The break statement is Executed then it jumps out of the loop.

i=20;
First print value of i(i.e: 20)
Check (i.e:20>=-10) true

Then value of i is 16 and print it(i.e., : i=20-4=16)
Then check as 16>=-10 true

Print 12(i=16-4)
Check 12>=-10 true

Print 8(i=12-4)
Check 8>=-10 true

Print 4(i=8-4)
Check 4>=-10 true

Print 0(i=4-4)
Check 0>=-10 true

Print -4(i=0-4)
Check -4>=-10 true

Print -8(i=-4-4)
Check -8>=-10 true

Print -12(i=-8-4)
Check -12>=-10
It is false
Then print the output as :20 16 12 8 4 0 -4 -8 -12

Answer is 20,16,12,8,4,0.

When i=-4 then
Because of if(-4>=-10)
It will not go inside if block
Because of -4 is bigger than -10 so,
Final answer is 20,16,12,8,4,0.

To the people starting programming, please use curly braces ({}) in your conditional statements. They say you can't teach an old dog new tricks. You have been warned.

ashok (;;) means there is no condition, it's of no use in that ,it will execute as long the if condition satisifes, then it will come out because of break statement.

All three conditions of for loop is optional.

-12 because after checking for -8 it will decrements it to -12 then print it then check for -12 which break the loop.

Starting from 20,
i = i-4
i = 20-4=16,
i=16-4=12,
i=12-4=8,
i= 8-4=4,
i= 4-4=0,
i= 0-4=-4,
i= -4-4=-8,
i=-8-4=-12

So ,,,20,16,12,8,4,0,-4,-8,-12....

Output will be 20, 16, 12, 8:

When var i is 8 then if(i>=10) condition is fail and go to break.

So, How will be the answer is [C].

-12 will also print because condition has been checked after print statement. That's why O/P will be 20 16 12 8 4 0 -4 -8 -12.

Here it is first printed and it is checked thats why we have -12 also and it comes out from loop.