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        P. 45
     Example
                 #include <stdio.h>
                 int main ()
                 {
                    /* local variable definition */
                    int a = 10;
                    /* check the boolean condition using if statement */
                    if( a < 20 )
                    {
                         /* if condition is true then print the following */
                         printf("a is less than 20\n" );
                    }
                    printf("value of a is : %d\n", a);
                    return 0;
                 }
                          When the above code is compiled and executed, it produces the following result:
                 a is less than 20;
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