Bug in C Counter - Syntax problem [closed]

Well, I was doing some basic programming exercises and I came across a bug that I did not understand very well:

#include <stdio.h>
#include <stdlib.h>


//Program prints the odd numbers until a determined limit. 
int main()
{
    int numeric_limits;
    int count = 1;

    printf("Enter the limit number.\n");
    scanf(" %d", &numeric_limits);

    while(count <= numeric_limits)
    {
        printf(" %d\n", count);
        count+2;
    }

    return 0;
}

This code above is in an infinite loop "Uns". While this one below works perfectly:

#include <stdio.h>
#include <stdlib.h>


//Program prints the odd numbers until a determined limit. 
int main()
{
    int numeric_limits;
    int count = 1;

    printf("Enter the limit number.\n");
    scanf(" %d", &numeric_limits);

    while(count <= numeric_limits)
    {
        printf(" %d\n", count);
        count++;
        count++;
    }

    return 0;
}

I'm programming in codeblocks ... I was testing in any online compiler to see if it was compiler problem, but in the online compiler it gave infinite loop too ... Does anyone know why this happens?