Programming 6

This program enables a user to enter a number and it shows the absolute value.
I used printf, scanf, and if function.

Source code:
#include <stdio.h>

int main(void)
{
double a;
puts("数字を入力してください");
scanf("%lf", &a);

if(a>=0)
printf("絶対値は%lf", a);
else
printf("絶対値は%lf", -a);

return(0);
}