(C syntax) input a number and output its absolute value. The syntax is a number.

(C syntax) input a number and output its absolute value. The syntax is a number.

Knowledge point:

If statement

 

Content: enter a number to output its absolute value.

Input description:

One integer in one row

Output description:

One integer in one row

 

Input example:

-3

Output example:

3

 

# Include <stdio. h> int main () {int a; scanf ("% d", & a); if (a <0) {a =-;} printf ("% d \ n", a); return 0 ;}

 

Entry C language: enter any integer on the keyboard and then output its absolute value.

Method 1:
// Use mathematical functions
# Include <stdio. h>
# Include <math. h>
Void main ()
{
Int;
Scanf ("% d", & );
Printf ("% d \ n", abs ());
}
Method 2:
// Judge
# Include <stdio. h>
Void main ()
{
Int;
Scanf ("% d", & );
If (a> = 0)
Printf ("% d \ n", );
Else
Printf ("% d \ n",-);
}

C language program 1 input a real number and output its absolute value 21! + 2! + ...... + 10! And the operation to calculate the factorial is defined as function 3.

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