toupper: The lowercase letter will be converted by uppercase letter using “toupper” function. Example: Consider the example of “toupper” is as follows: //declare the variable char c; //convert equivalent lowercase letter c = toupper ('x'); //display the output cout << c; Here, the “toupper” function is used to convert the given character into uppercase letter. tolower: The uppercase letter will be converted by lowercase letter using “tolower” function. Example: Consider the example of “tolower” is as follows: //declare the variable char c; //convert equivalent lowercase letter c = tolower ('X'); //display the output cout << c; Here, the “tolower” function is used to convert the given character into lowercase letter.

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Chapter 10, Problem 3RQE

Program Plan Intro

toupper:

The lowercase letter will be converted by uppercase letter using “toupper” function.

Example:

Consider the example of “toupper” is as follows:

//declare the variable

char c;

//convert equivalent lowercase letter

c = toupper ('x');

//display the output

cout << c;

Here, the “toupper” function is used to convert the given character into uppercase letter.

tolower:

The uppercase letter will be converted by lowercase letter using “tolower” function.

Example:

Consider the example of “tolower” is as follows:

//declare the variable

char c;

//convert equivalent lowercase letter

c = tolower ('X');

//display the output

cout << c;

Here, the “tolower” function is used to convert the given character into lowercase letter.

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