Computer fundamentals if else statement

The Ishango bone Devices have been used to aid computation for thousands of years, mostly using one-to-one correspondence with fingers. The earliest counting device was probably a form of tally stick. Later record keeping aids throughout the Fertile Crescent included calculi clay spheres, cones, etc. The Roman abacus was developed from devices used in Babylonia as early as BC.

Computer fundamentals if else statement

Computer fundamentals if else statement

This depends on the evaluation of the condition. If the expression is true, the if part is executed, otherwise the else part. In other words, one of the alternatives is executed. The general format of a two-way selection: One if can easily be avoided by using the concept of two-way decision.

Statement1 and statement2 could either be a single statement or a compound statement. The parentheses around the expression is required and one must be careful about the placement of semicolon before the else clause.

The two curly braces are must for a compound statement. Since a semicolon terminates every simple statement, the semicolon is required.

The rule not the indentation for terminating semicolon for the if portion is not going to be affected by the presence of an else statement. Multi-way decision Multi-way decision statements perform different jobs depending on the value of expression.

In multi-way decision, instructions are different. First check the condition, if true, then execute the if part.

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The first statement is optional. The programmer can put another condition after the first condition and so on. The same is true for the else clause. After if clause, the else part is written. An if within and if …. This means that the body of if statement could be another if statement.

This situation is called a nested if and is often used to choose between ranged of values. It allows you to make decision given the results of a previous decision.

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To illustrate a nested if, we next present a sample program. The problem is to get input in read in temperature and print out the appropriate message for football play. The constant values must be compared with the read in temperature using the following guidelines.zyBooks Loading.

Copyright (c) SEMM NL All rights reserved. Author: Paul Hamaker. Part of In Java all variables, constants and methods (routines / functions.

6 Quiz: Identifiers in All Caps public class BankBalance { public static final double OVERDRAWN_PENALTY = ; public static final double INTEREST_RATE = ;. Learn software, creative, and business skills to achieve your personal and professional goals.

Join today to get access to thousands of courses. Fundamentals of Computer Science Compound Statements a compound statement is a sequence of any number of statements enclosed in a pair of curly braces.

And sometimes the else if condition An if else statement must contain the "if" body, but "else" is optional Methodology: 1. The programmers write the condition inside the brackets of if 2. If the condition is true, the program flow shifts to the code inside the body of if.

Control structures in C++ | If else statement