Does mod work with negative numbers in C?

This is an example C program illustrating the behaviour of C’s modulo/remainder operator ( % ) for negative numbers. The modulo operator is not mathematically correct, since it turns negative numbers into negative numbers.

Can modulus operator be used with negative numbers?

Modulo and remainder operators differ with respect to negative values. With a remainder operator, the sign of the result is the same as the sign of the dividend (numerator) while with a modulo operator the sign of the result is the same as the divisor (denominator).

How do you find the modulus of a negative number in C?

Anyone can predict the output of a modulus operator when the both operands are positive. But when it comes to the negative numbers, different languages give different outputs. In C language, modulus is calculated as, a % n = a – ( n * trunc( a/n ) ).

Does C have modulus operator?

The modulo operator in C will give the remainder that is left over when one number is divided by another. For example, 23 % 4 will result in 3 since 23 is not evenly divisible by 4, and a remainder of 3 is left over.

Is modulus always positive?

Is modulus always positive? The answer is “Yes”. Reason: The value of modulus of any number is always positive.

What is difference between remainder and modulus?

Remainder is simply the remaining part after the arithmetic division between two integer number whereas Modulus is the sum of remainder and divisor when they are oppositely signed and remaining part after the arithmetic division when remainder and divisor both are of same sign.

What does %= mean in C?

%= Modulus AND assignment operator. It takes modulus using two operands and assigns the result to the left operand. C %= A is equivalent to C = C % A. <<=

What does negative modulus mean?

The modulo operator returns the remainder of a division. Doing an integer division and then multiplying it again means finding the biggest number smaller than a that is dividable by n without a remainder. Subtracting this from a yields the remainder of the division and by that the modulo.

How to do C modulo operation with negative numbers?

Modulus operator in c usually takes the sign of the numerator x = 5 % (-3) – here numerator is positive hence it results in 2 y = (-5) % (3) – here numerator is negative hence it results -2 z = (-5) % (-3) – here numerator is negative hence it results -2

When to use the modulus operator in C?

Modulus operator gives the remainder. Modulus operator in c usually takes the sign of the numerator Also modulus (remainder) operator can only be used with integer type and cannot be used with floating point.

When to use modulo and remainder in C?

This can only happen if 5% (-3) is 2. The % operator in C is not the modulo operator but the remainder operator. Modulo and remainder operators differ with respect to negative values.

When to add divisor to modulo modulus in C + +?

So, if in case your integer division rounds towards zero (which is mandated since C99 and C++11, I think), -5/4 will be -1 and we have In order to get a positive result (for the modulo operation) you need to add the divisor in case the remainder was negative or do something like this:

Does mod work with negative numbers in C? This is an example C program illustrating the behaviour of C’s modulo/remainder operator ( % ) for negative numbers. The modulo operator is not mathematically correct, since it turns negative numbers into negative numbers. Can modulus operator be used with negative numbers? Modulo and remainder operators differ…