If, Else If, Else

In micocontroller c programming and computer c programming, if statement can be used to test whether a condition is true or false. When a condition is true the statement after it will be executed, otherwise other statement will be executed. Example program :

#include <stdio.h>

int main()
{    int b;  
printf("Enter a value:");   
scanf("%d", &b);   
if (b < 0)       
{printf("The value is negative\n");
getchar();
getchar();

else if (b == 0)       
{printf("The value is zero\n");
getchar();
getchar();
}
else       
{printf("The value is positive\n");  
getchar();
getchar();
} return 0; }
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