C abs() function
C abs() function - Calculate integer absolute value
The abs() function is used to compute the absolute value of an integer value.
Syntax abs() function
int abs(int x)
Parameters abs() function
Name | Description | Required /Optional |
---|---|---|
x | Numeric value. | Required |
Return value from abs()
- Absolute value of its integer operand.
Example: abs() function
The following example shows the usage of abs() function.
#include <stdlib.h>
#include <stdio.h>
int main(void)
{
int x, y;
x = -347;
y = abs(x);
printf("The absolute value of %d is %d\n", x, y);
x = 456;
y = abs(x);
printf("\nThe absolute value of %d is %d\n", x, y);
}
Output:
The absolute value of -347 is 347 The absolute value of 456 is 456
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C Programming: Tips of the Day
What's the point of const pointers?
const is a tool which you should use in pursuit of a very important C++ concept:
Find bugs at compile-time, rather than run-time, by getting the compiler to enforce what you mean.
Even though it does not change the functionality, adding const generates a compiler error when you're doing things you didn't mean to do. Imagine the following typo:
void foo(int* ptr) { ptr = 0;// oops, I meant *ptr = 0 }
If you use int* const, this would generate a compiler error because you're changing the value to ptr. Adding restrictions via syntax is a good thing in general. Just don't take it too far -- the example you gave is a case where most people don't bother using const.
Ref : https://bit.ly/33Cdn3Q
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