Can Unsigned Long Int Hold Ten-Digit Numbers in C ?

Integer Types and Their Value Ranges in C

In C , different integer types have varying ranges of values they can store. This can be particularly relevant when handling large numbers, as exceeding the specified range can lead to undefined behavior.

Unsigned Long Int and Ten-Digit Numbers

On a 32-bit computer, the minimum range of values for unsigned long int is 0 to 4,294,967,295. This means that unsigned long int cannot reliably store ten-digit numbers between 1,000,000,000 and 9,999,999,999.

Ranges of Common Integer Types

The following are the minimum ranges you can rely on for various integer types:

• short int and int: -32,767 to 32,767
• unsigned short int and unsigned int: 0 to 65,535
• long int: -2,147,483,647 to 2,147,483,647
• unsigned long int: 0 to 4,294,967,295

Long Long Int for Handling Large Values

To handle larger values, long long int was introduced in C99 and C 11. The minimum range for this type is:

• long long int: -9,223,372,036,854,775,807 to 9,223,372,036,854,775,807
• unsigned long long int: 0 to 18,446,744,073,709,551,615

Therefore, long long int has sufficient capacity to store ten-digit numbers within the specified range.

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