width - It specifies the maximum number of characters to be. it indicates that the data is to be read from the stream but ignored. It can contain whitespace character, Non-whitespace character and Format specifiers.A format specifier will be like width modifierscype.

We will read more on scanf in our string handling section for handling other type of data. The scanf () function takes a format string as a parameter. Printf(' Welcome Mr %30s', name) // printing outputs Note that scanf function will read until it encounters any space or it reaches its limits. Note that after entering first number we have to press Enter and then write the second number. Printf(' Two numbers are %d,%d ' ,num1, num2) // printng outputs Scanf('%d %d',&num1,&num2) // Enter two numbers Int num1,num2 // declaring variables as integers Using one scanf statement we can ask for more than one data to enter See the &num to say store the input data in address of our variable num.Īs you have seen we will get the same data as output what we enter as input. It works much like scanf() but the data will be read from a string instead of the console. While using scanf(), before using the variable we will use & ( ampersand ) to indicate to store the data in address of the variable. In C, sscanf() is used to read formatted data. Printf(' You entered %d', num) // printing outputs Let us enter an integer value and then display the same value by using printf function. Once executed our program will wait for the user inputs once it came across any scanf function during program execution.

For example, if you input abc for an int such as: scanf('%d', &int_var) then abc will have to read and discarded.We can pass data to our C program by using scanf() function. While the 3rd scanf() can be fixed in the same way using a leading whitespace, it's not always going to that simple as above.Īnother major problem is, scanf() will not discard any input in the input stream if it doesn't match the format. Scanf('%c', &ch3) /* Doesn't read input due to the same problem */ Scanf(' %c', &ch2) /* The leading whitespace ensures it's the C11 introduces more secure version of printf()/scanf() called printfs()/scanfs() to deal with mismatched conversion specifiers. Scanf('%c', &ch1) /* Leaves the newline in the input */ Using a whitespace character in scanf() would ignore any number of whitespace characters left in the input stream, what if you need to read more inputs? Consider: #include See: Why does everyone say not to use scanf? What should I use instead?

Scanf in c