Jan 10, 2025 · If the character passed is a lowercase alphabet then the toupper () function converts a lowercase alphabet to an uppercase alphabet. It is defined in the ctype.h header file.

Dec 20, 2024 · Like all other functions from <cctype>, the behavior of std::toupper is undefined if the argument's value is neither representable as unsignedchar nor equal to EOF. To use these …

Converts c to its uppercase equivalent if c is a lowercase letter and has an uppercase equivalent. If no such conversion is possible, the value returned is c unchanged. In C++, a locale-specific …

This page contains document on toupper () function in C programming with example and explanation.

Following is the C library syntax of the tolower () function −. This function accepts a single parameter −. c − This is an integer value representing the character to be converted. It must …

Mar 1, 2024 · Each of these routines converts a given lowercase letter to an uppercase letter if possible and appropriate. The case conversion of towupper is locale-specific. Only the …

The toupper() function returns the ASCII value of an uppercase version of the character. If the character is not an uppercase character then its value is returned without being changed.

These functions convert lowercase letters to uppercase, and vice. versa. If c is a lowercase letter, toupper () returns its uppercase. equivalent, if an uppercase representation exists in the …

In C, the toupper() function is used to convert lowercase alphabets to uppercase letters. When a lowercase alphabet is passed to the toupper () function it converts it to uppercase.

Jul 23, 2025 · If the character passed is a lowercase alphabet, then the toupper() function converts it to an uppercase alphabet. This function does not affect an uppercase character, …