Can we write if statement in switch case in C?

If Condition This is basic most condition in C – ‘if’ condition. If programmer wants to execute some statements only when any condition is passed, then this single ‘if’ condition statement can be used. Basic syntax for ‘if’ condition is given below: if (expression) { Statement 1; Statement 1; .. .. }

How do I save a text file in C?

First string data to write into file, next pointer to FILE type that specifies where to write data. Use fputs() function to write data to fPtr i.e. perform fputs(data, fPtr); . Finally after completing all operations you must close file, to save data written on file. Use fclose(fPtr) function to close file.

Can a switch statement be written without a default case in C?

Sure, you can use an switch statement without a default case.

How switch statement is different from IF statement in C?

SWITCH allows expression to have integer based evaluation while IF statement allows both integer and character based evaluation. SWITCH statement can be executed with all cases if the ‘break’ statement is not used whereas IF statement has to be true to be executed further.

Which mode is used to create a new file if the file already exists?

Use the file mode w to create a new file Use open(file, mode) with mode as “w” to open a new file in write mode. If file is an existing file, it will be overwritten. Call file. write(data) to write data to the new file.

Can switch statement works without default?

No it is not necessary of default case in a switch statement and there is no rule of keeping default case at the end of all cases it can be placed at the starting andd middle of all other cases.

What if there is no default in switch statement?

The default statement is executed if no case constant-expression value is equal to the value of expression . If there’s no default statement, and no case match is found, none of the statements in the switch body get executed. A case or default label can only appear inside a switch statement.

Which is better if-else or switch?

if-else better for boolean values: If-else conditional branches are great for variable conditions that result into a boolean, whereas switch statements are great for fixed data values. Speed: A switch statement might prove to be faster than ifs provided number of cases are good.

How to create a file and write data into file in C?

Step by step descriptive logic to create a file and write data into file. Declare a FILE type pointer variable to store reference of file, say FILE * fPtr = NULL;. Create or open file using fopen() function. fopen() function is used to open a file in different mode.

How to create a text file in C#?

Create a Text File in C#. There are multiple ways you can create files in C# and .NET. This article provides code samples to create files in C# using File.Create () method, File.CreateText (), FileInfo.Create, and FileInfo.CreateText () method.

How to write to a file with newline characters in C?

In C, when you write to a file, newline characters ‘n’ must be explicitly added. The stdio library offers the necessary functions to write to a file: fputc (char, file_pointer): It writes a character to the file pointed to by file_pointer. fputs (str, file_pointer): It writes a string to the file pointed to by file_pointer.

How do you read and write a string in a file?

A file can be opened in a read, write or an append mode. Getc and putc functions are used to read and write a single character. We can write to a file after creating its name, by using the function fprintf () and it must have the newline character at the end of the string text.