Question

Evaluate c in the given java expression if a = 5, b = 8, [2]
int c= ++a + b++ + a+ --b+a++

Answer 1

Answer:

Arithmetic Operators are the type of operators which take numerical values (either literals or variables) as their operands and return a single numerical value.

Let's assume, 'a' is 8 and 'b' is 4.

Operator Description Example

+ Adds operands a+b=12

- Subtracts second operand from the first a-b=4

* Multiplies both operands a*b=32

/ Divides numerator by denominator. a/b=2

% Modulus Operator returns the remainder after an integer division. a%b=0

#include <stdio.h>

int main()

{

int a = 25;

int b = 8;

printf("sum = %d", (a+b));

printf("\ndifference = %d", (a-b));

printf("\nproduct = %d", (a*b));

printf("\nremainder = %d\n", (a%b));

return 0;

}

Output

Now let's talk about '/'.

If we divide two integers, the result will be an integer.

5/2=2 (Not 2.5)

To get 2.5, at least one of the numerator or denominator must have a decimal(float) value.

5.0/2=2.5 or 5/2.0=2.5 or 5.0/2.0=2.5 but 5/2 = 2.

#include <stdio.h>

int main()

{

int a ;

int b ;

a = 2 ;

b = 9 ;

printf ( "Value of b/a is : %d\n" , b/a ) ;

return 0;

}

Output

#include <stdio.h>

int main()

{

float a ;

int b ;

a = 2.0 ;

b = 9 ;

printf ( "Value of b/a is : %f\n" , b/a ) ;

return 0;

}

Output

As we saw, if 'b' and 'a' are both integers, then the result is 4 (not 4.5) but when one of them is float then the result is 4.500000 (a float).