Let’s have an example to understand else if clause : /* else if ladder demo */ main( ) { int m1, m2, m3, m4, m5, per ; per = ( m1+ m2 + m3 + m4+ m5 ) / per ; if ( per >= 60 ) printf ( “First division” ) ; else if … Read more
C allows usage of three logical operators, namely, &&, || and !. These are to be read as ‘AND’ ‘OR’ and ‘NOT’ respectively. There are several things to note about these logical operators. Most obviously, two of them are composed of double symbols: || and &&. Don’t use the single symbol | and &. These … Read more
The if statement can take any of the following forms: if ( condition ) do this ; if ( condition ) { do this ; and this ; } if ( condition ) do this ; else do this ; if ( condition ) { do this ; and this ; } else { do … Read more
It is perfectly all right if we write an entire if-else construct within either the body of the if statement or the body of an else statement. This is called ‘nesting’of ifs. Let’s have an example: /* A quick demo of nested if-else */ main( ) { int i ; printf ( “Enter either 1 … Read more
It may so happen that in a program we want more than one statement to be executed if the expression following if is satisfied. If such multiple statements are to be executed then they must be placed within a pair of braces as illustrated in the below example. Example: The current year and the year in which … Read more
Like most languages, C uses the keyword if to implement the decision control instruction. The general form of if statement looks like this: if ( this condition is true ) execute this statement ; The keyword if tells the compiler that what follows is a decision control instruction. The condition following the … Read more
Decision !!! we all need to alter our actions in the face of changing circumstances. If the weather is fine, then I will go for a stroll. If the highway is busy I would take a diversion. If the pitch takes spin, we would win the match. If she says no, I would look elsewhere. … Read more
Problem Statement: If a four-digit number is input through the keyboard, write a program to obtain the sum of the first and last digit of this number. Solution: /* Sum of 1st and last digit of a four digit number */ #include<stdio.h> #include<conio.h> main() { int n,a,sum=0; clrscr(); printf(“\Enter a four digit number”); scanf(“%d”,&n); a=n/1000; … Read more
Problem Statement : If a five-digit number is input through the keyboard, write a program to reverse the number. Answer: /* To reverse the digits of 5-digit number */ #include<stdio.h> #include<conio.h> main() { int n,a,b; long int revnum=0; clrscr(); printf(“\n Enter a five digit number less than 32767”); scanf(“%d”,&n); a=n%10; /*last digit */ n-n/10; /* … Read more
Problem Statement : Two numbers are input through the keyboard into two locations C and D. Write a program to interchange the contents of C and D. Answer: /* Interchanging of contents of two variables c & d */ #include<stdio.h> #include<conio.h> main() { int c,d,e; clrscr(); printf(“\n Enter the number at location C:”); scanf(“%d”, &c); … Read more