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I wrote a very small code in C which basically takes input from user, save in variable and print it out the same input given by user to screen.
But, When I entered "9879041552" it printed out really strange number. Although, some numbers are working fine, the numbers which are limited to 4 digits.
What's causing this unexpected behavior?


int main()
    int mobileNumber;
    printf("Enter your mobile number: ");
    scanf("%d", &mobileNumber);
    printf("Your mobile number is: %d", mobileNumber);
return 0;

What I have tried:

I am beginner to programming. I tried searching online but it doesn't give me any reason why this happened.
Updated 1-Oct-18 21:08pm

1 solution

The number is bigger than an integer (with 4 bytes) which holds up to 2^31-1 and a bit for the sign.

Use for phone numbers a char array often named string.

Google for some tutorials. ;-)
CPallini 2-Oct-18 3:17am
Member 14004425 2-Oct-18 3:23am
Thanks I understood.

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