Why does this C program give me an missing integer from an For loop?

I am trying to get the value of "w" but when I do the For loop ,it only gives me 4 results:

Problem:
https://imgur.com/a/F9wPKF7

Code:

#include <stdio.h>
#include <math.h>

int main() {
    int x,e,w;
    float a = 2.5;
    for (x=1; x<6; x++) {
        if (x>a) {
            w = x*cbrt(x-a);
        } 
        else if (x=a) {
            w = x*sin(a*x);
        }
        else if (x<a) {
            w = pow(e,(-a*x))*cos(a*x);
        } 
        printf("%d ",x);
    }

    return 0;
}

Output:

2 3 4 5 

I know in this program i dont search for the value of w but I wanted to see why does it give me only 4 number instead of 5? why is the one missing and ow can I solve it? Thank you

>Solution :

else if (x=a) should beelse if (x==a)