C If Statement Expression Solving

Expression Solving inside if Statement : C programming

Arithmetic expression can be solved inside if statement. In this case expression will be evaluated first and then result will be checked to decide the flow of code.

void main ()
int num = 56;
if(num % 2 == 0)   // Expression
     printf ("\nNumber is Even");
     printf ("\nNumber is Odd");

Explanation of Statement :

Consider the if statement –

if(num % 2 == 0)

above if statement contain simple expression which will be evaluated like this –

Result of Expression = (num % 2 == 0)
                     = (56  % 2 == 0)
                     = (0 == 0)

Now we can say that result of above expression is true thus if statement condition becomes true and if block gets executed.

Expression Solving : Arithmetic Operation

We will consider different verities of statements , Please refer below table –

If Statement Expression Result Comment
true Positive Number inside if will execute if block
true Zero Number inside if will make condition false and else block gets executed
true Negative number will be considered as true and if block gets executed
if(20 - 20 + 50)
true Expression will be executed and then it will be checked whether it is non-zero or zero

[box]Non Zero Number is considered as true and Zero will be considered as false[/box]